Close to exchange on a good property. High radon came up so we asked vendor for a retention as suggested by Radon UK. They said no way, as it was build in 2009 and passed building regs. All we want is something that says yes it was built to radon acceptable standards but there doesnt appear to be anything they can show us. Husband very worried and wants to pull out, saying radon advisory safe levels halved in 2010 so the first thing he would want to do upon moving in is test for radon.... House is top of budget, would be very hard to pay for remedial work (not hugely expensive but a few grand we wont have). I'm just not sure what to do. Estate agent basically saying we are being silly (which is really getting my back up) and it's normal, but when you look at radon uk it is impossible not to take it seriously....Surely?! Can anyone advise please? Thanks