Brooking 850 has an answer, but not satisfactory, since any well-behaved Commando owner will have Whitworth wrenches to pull the valve covers off.
850 Commando wins: to adjust the points plate, no WW size or 8mm or 11/32 fits that pillar screw, ya need the 2BA.
SteveA was 11 minutes late, and hopes for too much, I'm not that well-versed.
baz also wins for most creative use, so one plug each for 850 Commando and baz. You can both send me $10 for shipping, and I'll get them right out. Sound good?