It sort of follows on from the Liverpool 'Culture Company's attitude to using their logo.
When the city was in the competition to win the Capital of Culture status, they sent business people and community groups loads of promotional material; posters, stickers, logos etc. As soon as they won, and no doubt paid a fortune for a rebranding / redesign, they became a bit more reluctant to let people use ANY form of branding, unless permission was given by themselves. Obviously in the age of corporate sponsorship, they than started charging anyone who wanted to use the logo.
I went down the honest route and emailed them, saying I was a photographer in the city, and would like to display the logo on my website and the response I received asked me to pay £20 000. I replied explaining that that was a little much for a small business (i.e. just me) and was they any flexibility? They came back with a firm no, so I put the logo on there anywhere, without any problems.
Personally I wouldn't worry too much about them 'copyrighting Liverpool' - I've sold probably a dozen images with the 08 logo on it, and a few, with that as the main subject in an image. Otherwise they going to have to sue every photography in the city, if they are serious.