Rock Garden - the menu in the style of a comic

Here's a comic oddity...an 8 page colour menu for a restaurant (in Covent Garden) in the style of a comic. None of the art is signed.

The prices of the items on the menu can be seen in each panel. 

You'll see that the things on the menu aren't aimed at kids (crab claws with garlic mayonnaise on the first page for instance) so it must have been used by all the customers.

Hmmm, who can this character be that's advertising the hamburgers? 

The back page - beer and wine prices plus a map to where Rock garden was...