Pounds Yards is one of the major sources of surviving AFVs today. Many Sextons, M10s, Churchills, Centaur Dozers, M5A1 Stuarts and T16s seen today come from there. Luckily they were not all scrapped due to a slump in scrap steel prices and the fact that Harry Pounds likes/liked military vehicles - reportedly, of each type coming in his yard he kept the best. Also see this earlier thread:
Carriers in Pounds shipyard
Some more pictures below: first pic is one I took back in 1985, it shows a huge stack of scrap iron with a Churchill tank sticking out - gives some perspective of the size of this scrapyard.
The next pic shows forum member Terry Johns crawling over a T16, third pic was also taken by terry in 1994, the last one I found on the internet.