Hi Randelld,
Thanks for your reply, I'm glad someone finally did!
The reason I have two different file types is because I asked It's Cold Outside (an
SEO company) to work on the site and they wanted to use .php to increase web rankings.
However they didn't remove the original html file in case I cancelled the contract.
I've cancelled it now so I'm hoping that they'll delete all of their
SEO files.
When you say "You could be making much better use of html tags throughout the site too."
I have given every page a metatag containing relevant keywords for that page.
What more can I do?