This is a Strawberry tree, a native to the Mediterranean and to some areas of Southern Ireland. In England they occur as deliberately planted specimens and are quite rare. The fruit is similar in appearance to that of a strawberry but is unpalatable.
The bark is spectacular - red, maroon, purple with a bluey sheen - just ripe for painting.
This particular example is at Grey's Court, near Henley.
Work is still to be done.