That is the
old HEMS London website.
New one is
www.londonsairambulance.com 
which is now being regularly (almost daily) updated.
They also have a new fundraising blog with brief 'meet the crew' features etc. It can be found here
www.londonsairambulance.typepad.com and is very much in its infancy at the moment.
The old one has not dropped off Google's radar yet for some reason (and neither has the new one been picked up).