Just a note, do remember if you do taxi driving you will be in competition with the black cab drivers who have done the 'knowledge', along with the hundreds of illegal cab drivers that you still find outside clubs and pubs, despite the council's cracking down on them because of the obvious danger of getting in a car with a bloke you don't know.
Reading the A-Z might be a good idea now to familiarise yourself with the city. I once dropped my flatmate at the tube station the first week I moved down. An outward journey of ten minutes, turned into a nightmare return journey of three hours!
