I just got home after a trip to Europe including a week in Central London staying in Mayfair. We loved it all!
I saw a few interesting cars, but no M5s. I experienced the joys of the congestion charge when picking up my rental from Avis. I didn't drive much in central London (thank God!), but managed to get out to Hampshire to visit friends for a couple of days.
While stuck in traffic (not hard to do) it got me thinking - where do you go to give your M5 some exercise if you live in London?