Joe - thanks for your kind comments - they are much appreciated.

Chris - I have had a long, hard think about making a change to .php, but on balance I think I will keep things as they are. My website is in no way commercial and so optimum recognition by search engines is not so important. Also the site has now grown to such large proportions that I don't think I want to spend a lot of time and worry on all the revisions that will have to be made.

However, if I start from scratch on another website, I will no doubt go down the .php road from the start. I am grateful to you for your help in this - I know where to turn if I want to take it further! Many thanks.

Ian