Purdin: possibly Group Captain William Edmund Purdin (08061), (1899-1973).
Some background on him here which mentions an RAE connection:
https://www.the-saleroom.com/en-gb/a...8-a54100e417fa
Note name given on above link is William "Edward" Purdin, but some Gazette links such as here:
https://www.thegazette.co.uk/London/...ent/9/data.pdf
show "Edmund".