These lovely flowers are a-round 5 inches across and on a tree in a little park on Sullivans Reach, behind the Riverhouse Gallery in Walton on Thames.  Does any one know what the tree is?  It is a lovely little gallery with an auditorium and a good café.

http://riverhousebarn.co.uk/abThamesout/history/

The Thames was very busy as it was Saturday and the keen rowers were taking their exercise, as well as the narrow boats and pleasure craft enjoying the good weather.

 

Walton Rowing Club formed  in 1927
http://www.waltonrowingclub.co.uk/wp-content/themes/ultimate/js/html5.js