I love it when pensioners use words like bellend I find it hilarious ,makes them sound like a right err well bellend .
as said there is no actual law on stretch, only tyre manufacturers guidelines which is not the law, no one in the uk has ever been to court for runnining stretch as far as im aware ,many many opinions out there most people talking a load of tosh and don't really know what they are spouting just jumping on the they are dangerous bandwagon with no actual proof to back them up,its really no more dangerous than running a standard tyre under/over inflated/sidewall damaged/bulges etc by people who don't care about there cars and there are millions of people in this country that do this,so a few bellends including my self running the stretch aint going to change that statistic.
Ive been testing my own stretch tyres as I too had doubts about their integrity ,trying to force them off the rim on an actual disused runway at silly speeds and guess what.......nothing