Yesterday I landed in Heathrow and then went to pick a rental car. My first half hour driving on the left and using a stick after eight months driving an automatic was, say, interesting. Among other adventures, I met a nice policeman with a scary SMG. I ran into him after entering a restricted zone while trying to get out of the airport. He was very polite and couldn't resist smiling when I left and made some noise when switching gears, "Good luck with the driving", he said.
Now I'm in the lovely Cambridge and tomorrow afternoon I'll be talking at the UKUUG.