World-Class UK Venue

[MichaelC]

I read with interest this morning Bernie going on again about how the UK has no divine right to a GP, and Britain needs a world-class venue to continue hosting the GP.

We've all been talking about Silverstone v. Brands Hatch v. Donnington for who's going to end up hosting the race, but no-one's yet mentioned the UK's newest motorsport venue, the Rockingham Motor Speedway.
From what I understand, this is a US-Style oval, the first of it's kind in the UK, which means there must be plenty of space inside it for a road course.
Could the UK hold it's own version of the US GP there? Is there even any kind of ( or potential for ) a track inside the oval?