It poured most of the day if i remember right, Hpipe and i did most of the main buildings although some of the outer building we didn't get to as we ran out of time and it was one of those that is being demolished now so i think we missed our chance....
The site was constructed in 1937 and closed in 2004... some history here
http://en.wikipedia.org/wiki/British_Cellophane
Few Pictures..