I'm glad it's not just me. I nipped out of my granddaughter's 4th birthday yesterday to watch the cricket on Ham Common (near Richmond) and to keep an eye on the airliners on approach to Heathrow. At about 1500 I saw the object mentioned in the previous posts but in the time it took to get my camera out of my bag and to have a look at it with a long lens, it had dropped out of sight behind some houses. Very odd. By the time I got back to the party and told my wife she thought I'd been in the "Hand and Glove".