In email chat with Dave (Simms) he mentioned a group of mandarin ducks in Ickenham by the park off Swakeleys drive. This is pretty much one of my routes home and we finish at 4 on a Friday. So, with the traffic on the A40 not too bad i got there with still a glimmer of light in the sky. Only a minute or so's walk and you could make out what i guess was 8 birds, males and females. Looked wild enough to me!!!