This is a Catalpa Bignonoides Aurea, also known as an Indian Bean Tree.
Every winter I pollard it and am rewarded by lime green leaves six to eight inches across.
Yes they really are this colour!
It lights up a corner of my garden, and provides a bright backdrop to other plants in a bed beyond the trellis, that divides the garden.
In the summer it has sprays of frilly spotted white flowers like foxgloves, and then long thin seed pods which stay on the tree long after the leaves have gone.
A native of the south eastern states of America, it seems to like my garden in the south east of England.