Q. Where can I get GTA London?
A. GTA London: 1969 hasn't made it to the Rockstar Classics site, but you can still buy it for pittance in most shops. Failing that check eBay. GTA London: 1961 is available as a free download from the Official GTA London site
Q. What are the cheat codes?
A. Check out the information page.
GTA London shares the same engine with GTA, so if you need help with technical issues check out the GTA FAQ.