FindMyPast has the document recording the transfer from the Scots Guard to the Military Police
there are two addresses - the first for his wife Alice 20 Pennerley Rd, Minsterly, nr Shrewsbury, Salop
then there is a second address that looks like - Brishing Mill, Boughton-Am-Money, Maidstone, Kent
on the ship (Osterley) to Australia in October 1921 Maud Lilian Gundry gave birth to a daughter. Joan Osterley Gundry
The address recorded on the ships record of births is Bushing Hill, Boughton, Maidstone Kent.
record set on Ancestry
UK, Registers and Indexes of Births, Marriages and Deaths of Passengers and Seamen at Sea, 1891-1922
(address at 1921 is Brishing Hill, Broughton Monchelsea)
Seems to me that that, coupled with the pension record shows it is the same man.