hello. you are watching bbc news with me, david eades. the headlines: the british prime minister has been forced to carry out a reshuffle after two of his most senior ministers resigned over his leadership. the chancellor of the exchequer rishi sunak and the health secretary sajid javid both said they could no longer support borisjohnson. mr sunak said the public rightly expected the government "to be conducted properly". he's been replaced as chancellor by nadhim zahawi, the former education secretary. the leader of the opposition labor party keir starmer said the government was now collapsing amid sleaze, scandals and failure. prosecutors in the american state of illinois say the suspect in monday's mass

shooting at a fourth ofjuly parade near chicago has been charged with seven counts of first—degree murder. those are the headlines on bbc news. now on bbc news: the travel show. this week eva zu beck is in mexico's wetlands amid hopes that a clean—up could attract back one of the area's unique and distinctive creatures. this week on the show... i am in mexico to discover how a river cleanup is getting on, and meet this little local. this is so incredible! simon's here with tips on how to carry on travelling despite the cost of living crisis. i'm travelling by train through germany, on what i regard as the best rail deal ever. and a day trip to a thai prison, anyone?

this week, i am in the ancient wetlands of xochimilco in the south of mexico city, a unesco world heritage site and one of the country's must see destinations. this sprawling network of canals was first built by the aztecs and stretches over 180 kilometres. not surprisingly, the area now attracts masses of tourists every year. check out all of these amazing boats. they are so colourful. these are called trajineras.

i am here to meet carlos diaz, one of the best tour guides in town. but this isn't your typical sedate trip along the river. i was honestly expecting to go on a quiet little boat ride, but this place is a real fiesta. we are stuck in a trafficjam of like ten different boats. tourist boats, shop boats... singing floating band boats. there's a mariachi! mariachi music plays sings in spanish this is unreal. sings in spanish

woohoo! applause away from the joyful chaos, i want to talk to carlos about life on the canals. that's if i can keep us dry, of course! how important is tourism to xochimilco? how has the area changed in that time?

i mean, having grown up here in this area, how do you feel when you notice all these changes? but the problem is much bigger thanjust tourism. these wetlands are the lungs of mexico city, and provide the capital with around a third of its drinking water and a huge amount of food.

professor rodriguez—vasquez has been monitoring this pollution, and it is pretty plain to see why this situation is getting worse. this isn't the most beautiful spot in mexico city, is it? yeah. can you tell me exactly just how badly the water is contaminated here? it is very highly contaminated with pathogens, chemicals, pesticides, hormones and human waste also. wow. yeah. and here we have a lot of places like this. so this is not the only drain like this in mexico city. no, no, no, we have a lot. wow. not only does this pollution contaminate the water, but the dangerous pathogens can also evaporate into the air and be absorbed into the crops that are grown in the wetlands. you know, the moment you leave behind the super busy

embarcaderos of xochimilco, it feels like you enter a completely different world. there is so much wildlife here, so much greenery, it's just so serene. but even out here in the more remote areas of the wetlands, the pollution is endangering one of mexico's most iconic animals. the strange looking but much loved axolotl. what's so special about these little creatures?

i can't believe this is happening. i'm about to hold an axolotl! oh my god, it is so smooth, it is so lovely, it's like holding a baby! the axolotl is not only endemic to mexico, its population is limited to these wetlands. and the worsening pollution is threatening its very survival. this is the most incredible thing i have ever done in my life. 0k, put him back! thankfully the conservation project armando runs here has been a great success, and as a result axolotl numbers are now increasing across the wetlands.

armando�*s work is brilliant, but to fully restore the area to its former glory, ultimately the pollution needs to be tackled. luckily my friend professor rodriguez—vasquez mayjust have identified a simple but effective solution. in a rather basic looking lab in the wetlands, her team have invented a system that produces tiny bubbles called nano—bubbles, which can be pumped into the polluted water. how does the science behind this actually work? yeah. we create the nano—bubbles with solar energy, so these nano—bubbles can attack or can destroy the contaminants. as well as tackling the pollution, these nano—bubbles also help to oxygenate the water, breathing life again into the waterways.

honestly your lab looks, everything here looks pretty simple. yeah, it is very simple. it is very cheap, and also very easy to manage. that is the best kind of technology, right? when it is simple, straightforward, accessible and sustainable. exactly, sustainable. and what's even more encouraging is that this simple but effective technology can be used on trajineras, so the tourist boats can be a part of the solution in the fight against pollution. that's the button that starts it all? all right, let's do it! ready? yeah. you can see the nano—bubbles. oh, it's working! that's so cool! it's amazing to think that this piece of tech is actually cleaning the canals as we speak. amazing, hey?

what these projects across the wetlands hopefully show is that with a bit of creativity and collaboration, tourists can play a key role in helping to maintain stunning places like this. and that's got to be good news. and if you're planning a trip here anytime soon, here's a few things to think about. in western mexico, the world's largest gathering of mariachi bands will come together on 30 august to kick off a two—week festival dedicated to the country's most

traditional folk music. the celebrations will begin with a huge parade through the city of guadalajara where mariachi bands from as far away as japan will all play together. you can expect workshops, lectures and plenty of inescapable impromptu performances throughout the city for the duration of the festival. if you prefer the calm of the ocean, why not explore the second largest barrier reef in the world? the mesoamerican barrier reef runs along the caribbean coastline of the yucatan peninsula and is home to 66 species of coral, several hundred species of fish, as well as sea turtles, dolphins and whale sharks. rememberthough, reef environments are fragile to human impact, so be sure to dive with a responsible provider. for six days from 14 october, some of the world's finest classic cars will be covering over 3,000 kilometres

on a route from oaxaca to durango for la carrera panamericana. celebrating its 35th year, the pan—american race is one of the most important and longest road rally type races in the world. it used to be dubbed the most dangerous, but safety standards have come a long way in recent years. and of course if you are in mexico on 1—2 november, then you won't be able to avoid one of the country's guest event. more commonly known as the day of the dead, or dia de los muertos, the national holiday honours the deceased and many believe that on this day, the border between the spirit world and the real world dissolves, and so relatives often spend the night by the graves of their loved ones. stay with us, because still to come: simon has some cost—saving travel tips. if you are flying, then try to travel with cabin baggage only.

and thailand opens its prison doors to tourists. so don't go away. hello and welcome to this month's guide. well, summer is here and many of us are desperate to get away. but with rising costs and tricky travelling, the prospect can be off—putting. after some scenes of airport chaos, airlines have trimmed millions of seats from their planned summer schedules, causing fares on some popular routes to soar. so, consider going by sea. britain has excellent ferry links to france, spain, the netherlands and ireland. there is loads of capacity this summer and you can get some really good rail sale deals, such as about £40 one—way from many british

stations to ireland — and you get a generous baggage allowance. if you are flying, then try to travel with cabin baggage only. i managejust with this, and it meets all known airline rules. you won't need to queue up to check—in, there is no chance of your bag being sent to the far side of the earth, and no need to wait around at the carousel at the far end when you should be beginning your adventure. best of all, you'll save cash. and choose your day of travel carefully. for holiday flights, saturday and sunday are in strongest demand with friday and monday also busy. tuesday and wednesday are likely to see the lowest fares and the thinnest crowds. many viewers have been in touch about car rental rates. yes, they are higher than ever this summer. during the pandemic,

many car rental firms sold off their fleets and now, they cannot get enough vehicles to match demand. so, choose somewhere with excellent public transport to stretch your holiday budget. along spain's costa blanca and costa del sol, as well as the portuguese algarve, there are excellent coastal railways with frequent trains and subsidised fares making them excellent value. almost anywhere in asia, from eastern turkey to singapore, public transport is cheaper, more reliable and safer than self—drive. choose the train when you can, such as the amazing line through uzbekistan, paralleling the silk road from bukhara to samarkand and on to the capital tashkent. if you are on the road, simply choose the highest category of coach you can afford. america is in love with the highway but increasingly, the cities have reliable public transport connections such

as the brightline link from miami via fort lauderdale and soon opening all the way to orlando. and long—distance buses are making a comeback with one firm promising a privatejet experience on the four—hour run from washington to new york city. this summer, i'm travelling by train through germany on what i regard as the best rail deal ever. in the entire month ofjuly or august, you payjust nine euros for a ticket, taking you anywhere in the country on all but the fastest trains. the ticket is also valid on city transport, meaning you can experience the amazing dangling tram of wuppertal — the closest public transport gets to a theme park ride. to stretch your holiday funds the furthest, though, swap the med for the baltic beaches of eastern europe.

a trip to the coast of poland, lithuania, latvia or estonia is surprisingly affordable. and the black sea coastline of romania and bulgaria also offer outstanding value. going west, canada is significantly cheaper than the us, though in both nations, remember, you are now expected to tip 20%. for further fun adventures, wait until later in the year for tropical sun at affordable prices. two favourites of mine are the beaches and heritage of kerala in southern india and the long—time backpacker favourite vietnam. airfares in november in the uk are barely half what they are in peak summer. well, i hope some of those ideas have stimulated your travel appetite, whether you are hoping to warm up or cool off this summer. where there is a will, there is a way.

good luck. thanks, simon! ok, next up, we're off to thailand where the government is slowly turning some of its prisons into tourist attractions. rayong central prison, close to the capital bangkok, one of the first to open and we've been given special permission to go along and film there to check out what tourists can expect to see.

thailand has traditionally treated prisons as no—go areas. they're not terrible sanitary, they're usually overcrowded. i think that the department of corrections wants to be seen as, you know, joining a wider coalition of government agencies encouraging tourism, encouraging people to come back to thailand. they're certainly going to have to somehow improve conditions in some ways — at least on the surface — but the question is whether anything really changes.

we're in sydney as its most iconic landmark celebrates its 90th birthday. never gets old. this is amazing. and we hear about its role in bridging the gap between australia's different communities. more australians are supporting that the aboriginal flag sits atop of the sydney harbour bridge. if you can't wait for that, check us out on social media. search bbc travel show on facebook and instagram and look for the little blue logo. until then, from the chaos of xochimilco, safe travels and i'll see you very soon.

bye— bye! hello. we have some warmer weather to come for the uk in the days ahead, notably warmer for england and wales. it was a pretty chilly start to tuesday. it's going to be a much milder start to wednesday. we start as we mean to go on. we've sourced our air around an area of high pressure all the way from close to the azores. so through the night, we're actually going to be pulling in mild air all the while on a north—westerly breeze behind a warm weather front. and that weather front will bring some quite heavy

rainfora time for scotland and then some quite persistent but lighter rain sets in across western scotland for the day on wednesday, perhapsjust fringing into northernmost england as well. northern ireland hopefully brightening up as the day goes on. best of the sunshine will be across england and wales, but 20 degrees in aberdeen is up on the highs that we saw earlier in the week, and i think we'll see 2a, maybe 25 in the south—east of england. very high levels of pollen still across some parts of england and wales, with the cloud and rain at much lower levels for northern and western scotland. it looks like we'll continue with uninterrupted play for wednesday at wimbledon. here, again, temperatures up a little on those earlier in the week. thursday looks like it will offer up another fine day as well. lighter winds on thursday. it's going to be pretty windy wednesday across scotland. we'll have a little bit of a northerly breeze down the east coast. that takes the temperature down for norwich on thursday, but notice there, 25 in cardiff, 26 in london, that warmth building in the sunshine across england and wales. scotland and northern ireland always losing out to those higher temperatures thanks to thicker cloud.

could be quite grey and gloomy around some of the coasts and across the hills. some rain for western scotland on friday. but still we're seeing some of that warmth just pushing up towards belfast, edinburgh and aberdeen, but the really high temperatures, the significantly above average temperatures, are always likely to be further south across england and wales, even on into the weekend. we will see fronts continuing to push towards scotland and northern ireland, so the cloudier skies here, the slightly breezier weather story, some patchy rain, possibly, across western scotland, but temperatures still not too far off the mark, actually, for this time of year. the average is the low 20s. butjust take a look how they soar in response to the sunshine, the light winds across england and wales. i think on sunday, we could see somewhere in eastern england nudging close to 30 degrees.

welcome to bbc news. i'm david eades. our top stories: borisjohnson fights to survive as the uk's prime minister as two senior ministers resign from his cabinet in quick succession. their verdict on the prime minister is damning as they question his competency, integrity and seriousness. the suspect in the mass shooting at a july 04 parade near chicago has been charged with seven counts of first degree murder. and, as part of our climate critical series, we look at the dangers plastic pollution hold for the world's oceans.