Dennis,
I did not see any that would seem to fit. We seem to have two possible dates mentioned so far, i.e. July 26 or July 27, but I did not see any likely possibilities.
Most/all? of the Fighter Groups were based further to the east, many around Ipswitch for example. Thus for three (or four) fighters to be flying with drop tanks near Lambley, I would think it was possibly a training mission or a ferry flight, maybe from a depot in N. Ireland or some other northern location. If it was a ferry flight, the planes would probably not have been "assigned"/"registered" to a group yet, so searching in Fighter Group records may be useless. I don't know if the pilots would have been ferry pilots or if a fighter group would send men from the group "up north" to fly the planes back. ( And would a ferry flight from N. Ireland even need drop tanks?)
P-47s in N. Ireland
https://www.fold3.com/image/47643744
https://www.fold3.com/image/47643767