Earlier quoted context omitted.
This is pretty important point IMO. Why couldn't they use a local analytics system? Perhaps partner with one of the OS analytics like Piwik? Edit: Um, I just looked, they don't appear to be using GA but a local system already?
Err... Still there when I look at the page source for the front page at https://www.gov.uk
_gaq.push(['_setAccount', 'UA-26179049-1']);
We're also referring to http://gov.uk, which is what the OP link refers to, not the OP link itself.