Let's see...well, it looks like a good bit of GMC was filmed in the West End, and that's where we've stayed in the city. I've mentioned Battersea Park a couple of times, but here are some of the others, and they're actually some of the really well-known spots in the city.
"17 Highbrow Street" was in Kensington and Chelsea, which would have put it very close to the hotel we stayed in last time.
On the way to the Happiness Hotel, Kermit, Fozzie and Gonzo pass Trafalgar Square and go over the Tower Bridge - we spent some time in the square last year, and went walking out on the bridge.
When both our heroes and our villains are roaring off to the Mallory Gallery, Nicky's car goes past Harrod's - we've walked past it several times but never been inside.