My inner pages end like www.mydomain.co.uk/Contact.php Is this ok or should I change them to end in HTML, or doesn't it matter?
It all depends on who you're trying to please. Personally, I like the 'look' of: directory urls > blabla.com/mypage/ or plain old .html > blabla.com/mypage.html It's also much nicer to "hear", if for instance your URL ever gets read on a podcast or whatever. "BLABLA DOT COM SLASH MY PAGE DOT PHP" sounds nerdy. "BLABLA DOT COM SLASH MYPAGE" sounds far more accessible for your average granny. --- But, in the long run... no, it probably doesn't matter too much.
It really doesn't matter. However, I like my pages to be PHP to allow for modification and upgrades later on. If you are using PHP you should create a consistent header and footer that is included with the require_once tag in PHP. This will cut your load time and file size down immensely.
i think you should use php. suppose for any reason you have to download it to local server for editing and it doesn't have handler mappings configured; your php code won't work properly
if your contact page having form to submit to contact you, and if its posting to the same page then obviously this page require php programming and must be keep as is as .php page.. if this is just an static html page, then u can use it as .html page, not a problem.