First a fact - Charles Pratt is usually credited with the establishment of Camden Town in its current form. Until the 1790's land north of Tottenham court road was open land and fields. The locals found his name so funny they named a street after him.
The 12th letter you need is 'N' If you got them all then head to the pub, if not, here's your next clue.....
"If you've not got the time then you'll find it there, with occupy protesters intent on the square. First look for churchill then Nelson and Peel, If you've not worked it out yet then you're not for real. Hungry for clues? Head to Tesco but beware the 'Danger 230V' "