Is the Apple(ipad apple not fruit apple) store just off the london track because if so i've been there.
I also went to Switzerland and Eiger Nordwand last year. It is perfectly represented in GT5 although in real life it's just grass lol.
The Background image on Eiger and the "Wengen Station" is real. All else is fake.
Have been at the Ring some time.
I've been to:
Circuit De La Sarthe - Driven on it... Well the public roads bit and the porsche curves
Nurburgring Full 24 hour circuit - Driven it
Monza
Top Gear Test Track
Monaco GP - Driven it (public road)
London Street Course - Driven it (Public Road) - I'm actually looking at it right now, my office is featured on the game!
Going to the US later in the year and want to drive Indy and Laguna Seca if I get the chance.