The website features a functional mobile interface (except you cannot upload pictures).
If the site does not present a mobile interface, scroll to the bottom of the page and select the "Default Mobile Style"
If you visit the site using a mobile phone you should be prestented with the web interface which looks like this:
As you can see the listing of the forums.
VLCD's, Diaries, Slimming Clubs and so on and so forth with the technical forum at the very bottom.
When you tap into a forum you are presented with the threads:
And finally when you click into the thread:
You will notice some basic weight loss stats, and social network icons associated with the user.