Not being too pedantic, but according to "Oxford to Abingdon", "WL 3450 was a 14/28 Flat Rad. chassis number 198832, registered WL 3450 on 22 September 1927 as a Morris Oxford. the Old Speckled Hen Prototype Featherweight fabric Saloon bodied by Gordon England. This was the only 14/28 which was subsequently given an M.G. 14/40 car number Allocated 4F 2366 late in 1927 and retained by the works as a demonstrator. Driven by C. F. Dobson on the 1928 London - Edinburgh, gaining a Gold. So we are both correct!!!
JO 764 was the prototype Morris Hundred Pound Minor. I have a note that it was first registered to Morris Motors Ltd. on 11th December 1930. I'd be interested to see exactly what the Oxford RO record for this car states.