Thanks for your efforts John.
I have been tidying up the database listing of some 52 entries for the Provost and noted that G-BGSB is shown as having an unlikely cn of 886391, whilst the normal cn format for this aircraft is PAC/F/??? or PAC/56/???.
G-INFO states that the previous reg is 7792M which should lead to an RAF military aircraft reg.
Several sources link G-BGSB to WV494, including UKSerials listings for the Provost.
i.e.
PAC/56/057 WV494 Percival Provost T1 d/d 30/10/1953, to 7922M, to G-BGSB, pres. Oman Armed Forces Museum, Muscat.
Did someone err in listing 7792M instead of 7922M?
Also, if you view the original hand written G-INFO registration, there is a "scrawled" note that appears to read "aircraft in OMAN".
What do you think?
Malcolm.