Circa 1992/93, in the annual LTC round, I recall HQ STC adopting for planning purposes an 'Alternative Assumption' that would have seen Bentwaters/Woodbridge acquired - for Harrier basing, I think - as the USAF left. In the following year, that Assumption was dropped as it had emerged that the costs of changing from the US 110V power infrastructure would be excessive. I imagine changes at Mildenhall would be no less expensive.