Thanks all for the compliments.

They are Britannia 25/28mm ones - fantastic figures, I think still available from the chap who bought Dave's stuff after he passed away.
I used to have a manager who spent his twenties and thirties in Rhodesia and Angola with the SADF. By all accounts nasty wars: "We always knew when the East Germans were around, man! their artillery was superb ... and the Cubans we could always spot because they used to cut the tips off their bullets so they'd tumble in-flight, made a damn nasty thrum-whum-whup noise ... and the terrs themselves used mines all the time"