If you visit this page:

http://www.thenailbeautique.co.uk/apartments

And click into one of the apartments, when you click the back button in your browser it returns a blank page. We do not know why this doesn't work. The back button seems to work on most pages but there are a few like this one which return a blank page. If anyone can point me in the right direction I would be extremely grateful 

Thanks Guys!