What a monumental pile of crap
Doesn't render on my IE9
On FF3.6 at 640x480 (yes, they still exist, reason why left as an exercise for the reader) it gets its knickers in a knot when scrolling. Can't leave feedback on the site for same reason.
Final insult; its sets Google Analytics cookies without the user's prior consent. Somebody in .gov.uk not keeping up with new legislation!