Alastair,
The first post image shows an Australian ARN of 123921. A quick check of the register in AWM126:
https://s3-ap-southeast-2.amazonaws....ge/6967645.JPG
shows:
ARN: 123921
Original engine: 3G92612F
Re-engined 1948 with 3G7712F
Hull Number 1920.
There is no disposal information listed.
All adds to what we know about your vehicle.
RE two fuel pumps: I had a CMP with both the mech and electric pumps, and as Rob said, saved a lot of cranking and overcame the vapour locking. The electric pump was controlled by a switch on the dash - there is a space for the Autopulse switch on the CMP cash panel, but in Australia, it was not used. I think it was a requirement for CMPs supplied to India (?) Hence, the autopulse pump was only activated as needed, not all the time. I also had a flick switch that delivered 6V to the coil just for starting, rather than 4.5 V - made a big difference, too.
Mike