Thanks for the update Jono, and thanks to Tramp for conceding that there could be an issue.
I don't know if you read my @4 Jono where I was wondering if that synonym for "mansion" had been used previously in a Prize. Initially I thought I'd only seen it in barred puzzles, but then had second thoughts.
Don't put yourself out, but I'd be interested to know if you can shed any further light on it.