RAF Mildenhall?
The Americans are leaving RAF Mildenhall which has good road links, long runway, was a Shuttle Abort site and is in the East of the UK, but is a tad close to Lakenheath.
RAF Coltishall is probably going cheap, but has been closed for a long time, only connected with awful roads and the Category 3 prison might not convey the impression of a bright new future the British Government is aiming for.