I went to Kempton Park autojumble yesterday where I saw a chap selling an A7 that he had listed as 1953. On closer inspection it was a 1953 plunger frame with a 1948 long stroke engine, 47/48 complete front forks with QD brake hub, mudguard and stays, a correct rigid hinged rear mudguard with plunger stays attached and rigid lifting handles. It even had the correct 47/48 drive side front engine plate with dome cover. I don't believe he sold it as I saw him loading it back into his van at the end of the day. He might be there again at the next one.
Shame, I could really do with a domed engine plate and rigid lifting handles but think that it might be a bit much to buy the whole bike just for them.