Does anyone know about driving parks/areas around London? (East)

Basically both my parent learnt to drive at a private (off-road) school place, where they had road etc. in Germany. I would like start to learn a bit in that sort of place. Here is a link to what I am saying http://www.under--17--driving--lessons.co.uk/throckmorton-worcestershire.html but this is located somewhere north.

I am 17, so I can start driving with an instructor on road, but would prefer starting off like this, if they have something like this in around South/East London.