Worst was a Marchetti coming head on over Rochester, when I was taking a service from Rochester ATC. Thanks for that who ever you were. A set of wheels seen out of the cockpit out of Biggin, missing me by feet, on the quad rule, thanks once again who ever you were. And finally to the gentleman who flew the Le Touquet circuit 200' below circuit height and omitted to tell Le Touquet he was there until base leg. I luckily had already seen him and his lunch companions.