Hi Matthew,
The Defense Medal
In each case, this is actually the British War Medal (Defence medal is a WW2 medal, in fact you have the ribbon for it alongside the Africa Star, its the green/orange/black one).
First off, do you know if these individuals survived the war at all? If not then check CWGC to begin with. Flavell is obviously one who should be listed there, hence the Dead Mans Penny.