THEKLA and MANOR PARK ex QUO VADIS at Hendon Dock, 17/5/1981.
THEKLA was sold as a Theatre, arts & crafts centre and moved to Bristol about 1982-3 and marketed as OLD PROFANITY SHOWBOAT, although still showing the name THEKLA. The photo below was taken at Bristol on 12/7/1989, and the wording OLD PROFANITY SHOWBOAT can just be seen on the bridge. (I believe the barge PETER alongside was built in Holland in 1931)
For fuller details (and owner) see
http://en.wikipedia.org/wiki/The_Thekla