Kingfisher.

We tracked this little lady for well over an hour as she flew from tree to tree along the streams and ponds in Bushy Park, never able to get close enough for a really good shot. 
I recently learned how to tell a male from a female Kingfisher - the female wears lipstick - the male has an all black bill.
You can see two more images here.
I had a quick chat with Hillyblips as she and her husband were queueing up to get out of the horribly gridlocked Bushy Park Car Park. Give me a bike any day!