if you like trees, you will love shimla.rtment numbers every tree, so they know if any go missing. many do. one reason is because constructable land here is so scarce and costly. property fetches a premium on the market, a massive amount of pressure on trees to cut them down and turn that land into land that can be built on. now the forest department is turning to technology to fight the felling. like radio frequency identification, the tags shops use to stop people stealing stuff. the earlier method was to number these trees physically on the ground. but now we can put these rfid tags so that it can be monitored remotely. 2a hours a day. you set up a radio network that effectively sends you an alarm if a tree's being tampered with. yes, exactly. even if the tree is being cut or an axe is being used on this tree, the vibration gets into this. so what's to stop me from just pulling off the tag and cutting the tree down? how is it going to work? there is a pin inside? yes. if you look at the reverse of this rfid tag. there is

if you like trees, you will love shimla.s are built around them. so they know if any go missing. many do. one reason is because constructable land here is so scarce and costly. that can be built on. now the forest department is turning to technology to fight the felling. people stealing stuff. physically on the ground. be monitored remotely. 2a hours a day. if a tree's being tampered with. yes, exactly. tree, the vibration gets into this. and cutting the tree down? there is a pin inside? yes. if you look at the reverse of this rfid tag. is pulled out from the tree. then a signal which directly goes to the receiver. been illegally felled. to be through technology and taken out of the hands of people. they can be threatened. so we wanted a system which is not based on trust. which can only come from technology. crime is involved. they are very valuable commodities. that's £5,500, $7,000. there is an active mafia. they have guns and they are violent people. for them we need drone surveillance. intelligence engine. and locate in

and from david in shimla, back to an excited audience here in new delhi, who, from what i could tellatching. don't forget we live on facebook and twitter at bbc click, where you can see loads of extra backstage photos and fun. but for now and from this wonderful audience, it's goodbye and we will see you soon. the wettest of the weather this weekend across central and southern areas of england and wales, we've already got outbreaks of rain working eastwards. the northern extent of this probably from northern parts of wales to northern parts of east anglia, with lots of cloud ahead. some bright, sunny spells across scotland but quite a few showers feeding into northern and western areas of scotland. temperatures not much higher than 12 or 16, still quite gusty winds for the western isles of scotland and later for south—west england. overnight rain eases away from the south moor arrives from the west. clear skies for many many though still showers peppering northern parts of scotland and quite a chilly night away from the far south. more rain to come tomorrow across central and souther