You are probably aware of this now but we purchased our house in Feb 2007 and were told that the Fosse had to be emptied by the previous owner and a certificate provided stating such. It was done, we believe, as we have a certificate. However, we also have a certificate to show the chimney was swept - but it was blocked. Take care and good luck.
I find this perplexing as I have only one leg and severe problems with my hip and pelvis meaning I can only use my prosthesis 50% of the time. Yet I am not disabled - even my doctor tells me so. I am a little confused - perhaps the good weather, wine and food encourages fresh growth ??