world powers agree to uphold a un weapons embargo as part of efforts to resolve the conflict in libya. security forces used water cannons. documents seen by the bbc show how africa's richest woman made her fortune by corruption and exploiting her own country, angola, isabel dos sa ntos her own country, angola, isabel dos santos is the daughter of the former president. she denies any wrongdoing. and a crucial test for the space x crew capsule seems to go

to plan. the simulation of an emergency landing is the last major test before it plans to send astronauts to the international space station. now on bbc news, our world travelled to the cauca valley in colombia to find that farmers are now caught between new criminal gangs with devastating consequences. for years, i have been reporting on the uk's voracious appetite for illegal drugs. i have watched the market being flooded by cocaine that's cheaper than ever. so i've come to colombia, where 70% of the world's cocaine is produced, to find out why. i'm getting rare access, a chance to meet the cocaine producers in one of the most dangerous places in south america. and to meet the smugglers who are sending the drugs abroad. how many of those shipments

would you expect to reach europe? criminal gangs are killing anyone who stands in their way. those gangs are never far away. some armed men have been spotted nearby. i want to discover what's happening now in colombia that's making cocaine in the uk more available than it's ever been. for 50 years, colombia was home to the world's longest running civil war but in 2016, a historic peace deal was signed with the main rebel group, the farc. a new future was the promise — newjobs, new roads — all negating the need for the farc to produce cocaine to finance their political goals. but just a year after signing

the deal, cocaine production reached record levels — up nearly a third to around 1.5 million kilograms. i am heading to an area where the cocaine trade begins. this road takes me to one of the main cocaine—producing parts of colombia. what i'm hoping to do here is to meet some of the farmers who are growing the coca leaves. colombia has spent billions of dollars eradicating coca plantations, so farms are well—hidden. when you come here, you begin to realise how absolutely professional these criminal gangs must be if they can get a tiny amount of cocaine from these remote areas to the bars and clubs of britain. the peace deal weakened the farc, allowing other criminal organisations and dissident farc members to seize control. abandoning political ideology,

the groups make cocaine production more efficient. this is a perfect spot to highlight the different gangs that are trying to vie for control of cocaine. from this valley, downwards, is controlled by the clan del golfo. behind me, over there, is the eln. this side is the eln as well — different branch. the roads at the bottom, they are are controlled by another group called los caparrapos. after hiking for hours, i arrive at the coca field. how old are you? shouldn't you be in school — wouldn't you prefer to be in school? the peace process promised farmers

they'd get help to grow legal crops, roads would be improved so they could access markets, but of the nearly 100,000 farmers who signed up, more than half are still waiting for any help. does it pay well? all this effort and you can get maybe $150, maybe $220 every two months? these farmers also start the process of turning innocuous leaves into one of the world's most addictive drugs.

a shack is well hidden. this is where i'm told the next stage of the cocaine process happens, and i'm told it's disgusting. i can assure you, it certainly smells awful. first, they add limestone, then ammonia. it's hard to believe that people will snort all these poisons — not to mention the environmental destruction they cause. the chemicals that they are adding will run off down the hill, into the rivers that we have been walking through today. guys, we have to leave.

0k. there are people coming, there are people coming. some armed men have been spotted nearby. this emphasises how dangerous this entire region actually is. in the dead of night, the young men return and continue the production process. the incident that made us run turned out to be four members of the clan del golfo being arrested by the army. to when we left last night, this was covered and left, so all those leaves become this. it stinks. the next stage is add heat to remove

the water and turn it into pure cocaine paste. then it's sold to the criminal gangs. they have crystallising labs, where they will add more strong chemicals, such as sulphuric acid, and turn this paste into white cocaine powder. so if you could produce more, you would produce more? there's lots of people have been killed in colombia because of cocaine. violence is spreading

across colombia. a coca valley in south—west colombia has turned into one of the most dangerous regions of the country since the peace deal was signed. this is home to the indigenous nasa people. there are nearly 200,000 of them and colombian law grants them the right to rule their ancestral land. they live out here, in these rural areas, in the hills and mountainsides — and this area used to be controlled by the farc. exercising their rights meant that, for decades, the nasa suffered under the farc. but since the peace deal, things have got even worse. as different gangs now compete for territory, the nasa are being attacked from all sides. more than 50 of them were killed last year. the un has described their situation as dire.

wilmer invites me to attend a meeting of some of the victims of the violence but, before we set off, he insists we perform an ancient custom. this is a spiritual ritual that the indigenous tribe perform before they go to anywhere dangerous and, essentially, you have

to walk in a certain way towards this circle. under this rock? record levels of cocaine production are only worthwhile when the drug can reach its foreign market. these roads are of strategic importance. so the reason this area matters to the gangs, the criminal gangs, is not because of what's grown here? throughout the journey, wilmer is nervous, intensely focusing on each vehicle we pass.

it is an uneven fight and ijust wonder why you don't let them use the routes. the consequences of opposing the gangs soon become very obvious. so what happened here then? cristina bautista was a 30—year—old indigenous leader.

but her bravery made her a target. just ten days before my arrival, she was killed alongside her four indigenous guards. we finally arrive at the village of tacueyo. this meeting has been organised by the peace commissioner, forced by a spate of killings to confront a community that feels abandoned by the government.

just tell me about cristina. what sort of person was she? the peace deal was negotiated by the previous president amid opposition from many members of the current government. they have been in powerfor almost 18 months under the leadership of president ivan duque, who has been accused of failing to support the agreement. i grabbed the chance to put the concerns of the nasa people to the peace commissioner. so a lot of people in this area believe the recent violence is a direct consequence of this government failing to stand up for the peace deal. that is — they never said that. they tell that to me. the peace agreement was designed

to be implemented in 12 years. we are beginning. we are in the transitional process. so this is not the reason, the reason is not the trafficking. i don't know if they told you... but... no, absolutely. is this an interview? this is being filmed. is that — are you ok with that? yeah, but i need to be prepared with that because you are asking me questions... 0k. um, right. because we were trying to get an interview with you in bogota next week. yeah. we will do that. but the interview never happened. and with that, off went the government officials by military helicopter, rather than riding the risky, rutted mountain road. the nasa people have their own blue uniformed security guards, of whom canas velasco was one. last february, he was part of an unarmed team that recovered these weapons and arrested

eight farc dissidents. the incident made him a target and in october, the father of six was assassinated in front of his wife. wearing this uniform increasingly requires courage. this man survived the ambush that killed cristina bautista. given what you have seen, and the dangers involved, why do you continue to do this?

the violence is driven by the vast fortunes to be made getting cocaine from the mountains to the markets. this northern part of colombia, by the caribbean coast, is hugely significant for growing bananas. but the huge number of containers needed to send the bananas overseas provides a perfect opportunity for the drug smugglers to send cocaine abroad as well. this is the port of zungo embarcadero, a key smuggling spot. the shallow waters mean containers are carried by tugs to a floating port three hours away, where large ships will take them on to europe. i'm off to meet a man who sends up to a tonne of cocaine to europe each month. and he's not the only one. dozens of smugglers use the port,

working for different groups, but all paying taxes, access charges, to the clan del golfo — currently the biggest organised crime group in colombia. how easy is it to transport cocaine out of colombia?

for real?! in any one year, you will try to get 12 shipments to europe. how many of those shipments would you expect to reach europe? how much do you get paid for sending this through? so you make about $150,000 per shipment? and you've been doing this for six or seven years, so you have earned millions doing this.

do you take cocaine? no. why? but others are not so squeamish. colombia's most famous export has never been in greater demand in the uk. before heading to columbia, i met someone who was interested in talking to the farmers. so earlier, i asked you did you know what happened to the coca plant and you said no, so i want you to have a look at this video. in nottingham, meet 25—year—old lewis bradwell. he started taking cocaine as a teenager. what was a regular habit is now an occasional hit, if friends are doing it. he's keen to know about the origins

of the drug and readily agrees to chat to the farmers, so we arrange a 6,000—mile conversation about cocaine. so you never take cocaine yourselves? smart lads. you feel a buzz, a rush, uplifted. you have plenty of energy. you could stay awake for two or three days on end. yeah, afterwards, you feel terrible. you feel crap the next day.

i started when i was probably about 19. it's put in front of us everywhere. i've seen it from a young age. you can't really get away from it. that was the main reason i wanted to stop doing it in the first place, because the cost was through the roof. i would be spending £200 easily — £200, £300 a week — which is your two—month wage, easily, every week, just on cocaine. it's been an eye—opener talking to you both. i am shocked how young you both are. and no—one, at 16 years old, should be dealing with such stresses of getting you 12 years in prison or getting killed by another rival gang.

thanks, guys. some areas of colombia are facing a perfect storm. they feel the government has failed the peace process, allowing new murderous gangs to exploit the vacuum. they, in turn, are eyeing the vast fortunes to be made supplying increasing demand from wealthy foreigners for cocaine. both production and consumption of the drug are at record levels, leaving these communities feeling ignored and helpless.

this weekend has brought a lot of welcome sunshine to our shores. it has been very cold with some hard overnight first and parts of northern ireland have seen their cold est northern ireland have seen their coldest weather of the season so far and fog has been an issue particularly through sunday across the west midlands and into north—west england, because the further fog throughout this week. high pressure continues to dominate for many of us, it say largely dry butice for many of us, it say largely dry but ice could be a risk and further local fog patches will stop here but ice could be a risk and further localfog patches will stop here it is, high pressure as we run the sequence is, high pressure as we run the sequence through the week. this weather front may bring the cloud and a few spots of rain to the northern half of the country through tuesday to the early parts of when to but it will clear away and were back to high pressure but then of

the week there are signs of something more unsettled starting to put in front of the atlantic. monday morning starts off cold for central southern parts of the country, widespread frost and clear skies will start with sunshine was that they could be a little bit of mist and fog around which can be more extensive and stubborn declare. further north, it was doubtless cold because there is more cloud around bridges in the afternoon topping around ten or 11 degrees for central northern scotland but further south it will be chilly but at least there will be sent on to compensate. as we had three monday night, again clear skies for the south and it will be cold and frosty with thick cloud in the north and it will be less cold with lows of five to 7 degrees. this layer of cloud is actually with that week where the front i showed you which could bring a little bit of drizzle to scotland and northern ireland, perhaps into northern england into the afternoon, when we have the cloud, temperature is around nine or 10 degrees but some brighter colour whether moving in behind it and it should be bright as

well across the south of the country but again chilly so it means wednesday morning, where we have a clear skies, north of scotland, southern england will start chilly but else i will be less cold. high pressure is with us on into wednesday, very light winds so there will be very little to mix the air up will be very little to mix the air up so it could be a bit messy that on wednesday, variable amounts of cloud, at this stage the north—east of scotla nd cloud, at this stage the north—east of scotland and parts of southern england and wales could see the best of any breaks in the cloud, the place that keep that cloud could be quite misty and murky with some health fog and temperatures in single figures so it will be on the cooler side. as we head on into thursday, better chance of seeing some sunshine around i think across scotland, parts of northern ireland, may be into southern and southern eastern portions of england. again it will feel quite cool and murky where you have the cloud but pleasa nt where you have the cloud but pleasant enough in the sunshine, 10 degrees. thanks to high pressure, most degrees. thanks to high pressure, m ost pla ces degrees. thanks to high pressure, most places will be dry, variable cloud, some sunshine as we head on

into the weekend, temperatures a bit high and there is some rain, that lies in thejet high and there is some rain, that lies in the jet stream which will start invigorate as we head into the new weekend and beyond taking aim at the uk and that will start to bring weather systems into our shores at the high—pressure retreats into the near continent. that pressure will build in, packed isobars and some rain, some areas could see the impact of that but other areas stay dry. it will become more unsettled and the low pressure will weaken our shores to bring spells of rain but it will feel less cold as well.