OD, similarly I attended such a ceremony at Bury St Edmunds. While the immediate commander was army the RAF managed the ceremony. The firing party was absolutely perfect with 3 volleys with a single bang each time. There was a flypast by Tornadoes from Marham. I don't know how many as they were above cloud but they were low and spot on time.
It really was a most moving occasion. The widow was ex-WRAF.