Agree this issue will face all airports. Baggage belts are another pinch point as normally passengers are all trying to grab cases as they pass while standing 3 deep.
So I take a chance and fly Easyjet with its policy of no middle passenger. I am sitting there just boarded in my own personal space when someone comes up with an oversized bag and then puts it in the locker above my head while breathing all over me.
Then I could come back to this at Luton. This is the queue for Border Force. Sorry there is no way social distancing can be achieved when flying and it can't be achieved at Luton