Hei !
Jeg sjekket litt med venner i England, og de skriver følgende:
The best advice I can give someone coming to London is to buy a 1 day travel card (usually from a railway station) that covers quite a few, if not all zones. It is very cheap and allows you to use the Tube and busses all day. As far as car related things to do in London, that's a challenge. Shows tend to have closed down by now, and most take place outside London anyway. Car cruises sometimes happen at Krispy Kreme donut shops, of which there are plenty in and around London, but again they are mostly done for the winter.
A search thread for American car parts like
http://search.yahoo.com/search;_ylt=A0g ... ta=vc%3Duk might be the best way of getting stores in the London area.
The main supplier of American car parts that I know of is US Automotive -
http://www.usautomotive.co.uk and the might be able to ship to a hotel in London?