A while ago I went looking for cocktails named after places and boroughs in New York. There's really quite a lot of them from the well known Manhatten to the Harlem Mugger. That led to trying to do the same thing for London but that proved much harder. Scanning the whole of the Savoy Cocktail book only turned up the Piccadilly and the Mayfair.

This week's cocktail is the Piccadilly.
http://savoystomp.com/2009/07/27/piccadilly-cocktail/ 50ml Gin (Portobello), 25ml French Vermouth (Noilly Prat), Dash Grenadine (Monin), Dash Absinthe (No Absinthe so I used Bourdin Pastis), Shaken, Martini Glass. The end result is pink so I added one fluorescent Opies maraschino cherry as a garnish. I'm not really convinced, especially as the Pastis overpowered the other flavours. The Grenadine is really just colour. I think there might be a drink in there though where you make a wet martini (say 4:1) add a dash of grenadine for colour, stir so it doesn't dilute so much and then do a absinthe/pastis wash of the glass the way you would making a Sazerac. So there's just the smell of the Anise without so much of the flavour.