New Guv's Test 5

Blogging is a bit dificult at the moment as we are in the throes of moving house and the internet connection is not sorted. Here though is another question. It may be the last as my memory is running out.

How many tiles are there on the roof of Edmonstone?

Now this, of course, is an out of date question, but I am looking for the pre 1999 answer.