The 4 hours we were in London were fast and furious. We got off the tube at Picadilly Circus and had 2 hours to catch our shuttle to the next airport at Baker Street. After our encounter with border control, we realized we needed to get to an internet cafe ASAP and print out some proof of our finances & trip plans. So, the 2 hours we had to explore were spent internet-cafe hopping, eating at a yummy place we read about on spottedbylocals.com and then taking in what we could on our brisk walk to the shuttle. Not ideal, but I'm glad we didn't opt to take a bus straight from one airport to the other. Now we have a very tiny sense of what London is like.
I'm still getting used to color correcting and image prep on a laptop, so please excuse me if these look crazy on your end :)