There is a picture in the Puma scrap book in Aldergrove, (if it is still there) that was taken of the last FAA F4 with two Pumas on it wings. The Tomb was flown by the unit test pilot before it was going to be modified for RAF service and it was the only time when a F4s minimum speed was the same as a Puma could manage with a bit in hand for formation keeping.