Cliff made mention of the motorbike and the freedom that came from it. I've encountered a few stories of airmen with various forms of motorised transport (and not so motorised, like a pushbike...). The pilot of the crew I'm researching shared a car with his deputy flight commander (a guy called Dan Conway), the vehicle being affectionately known as "Gearless Gertie". I'm assuming that Dan took over full ownership when Phil was posted missing over Lille, there being no further mention of it in any of his letters after returning to the UK (though he does write about claiming his wireless back).
Was the MUG thrown out with his turret or did you find him elsewhere in the aeroplane?