Overland AAR in the UK is an unusual activity. Some years ago, even use of the AARAs over SW England became restricted unless approved for specific purposes. There are a couple of 'Refueler' routes used by the USAF, but neither route through the Lichfield Corridor.
Hence conducting AAR in the Lichfield Corridor must have been required as the result of an operational imperative. If that was the case, you are unlikely to know why on an open Internet website.
Good photo though.