Can you help?

I wondered if anyone out there can help me please.

I have just been involved in our local "open gardens" weekend. 

The star of my garden was a plant i bought at an exotic plant sale 3 years ago, simply labelled as "Shrub Oak"

It is currently about 2 feet tall, the leaves are oak leaf shape, but are up to 12 inches long, the leaves turn brown in the autumn, but it keeps them until spring before growing a new set.

I have been trying to find out more about it, but without the Latin name i have failed. So if anyone could help i would be grateful. 

Last edited: 27 June 2017 12:26:23