These days Newquay (the airport formerly known as RAF St. Mawgan) is practically a satellite of Brize Norton
....and a C17 observed in the circuit at Exeter whilst passing a few weeks ago.
At my local-ist airfield, Blackbushe, there have been some fairly regular recent (refuelling, I think) stops by Irish Air Corps helo's, when Odiham (which you would think more suitable) is a stone's throw away.