#17, DaveF68, calls me on “most” RAF dumb bombs were US. My source was a throwaway (“US origin”) in a journo Falklands effort. So I delved. M44 Bomb, HE, MC, 1000lb, single lug was dual sourced UK/US, 1941-43, RAF and USAAF dropping either/both. Vulcan 607,P.178 has Waddo finding 41 on site, and scavenging another 167. 63 were expended in Corporate. Unless a thriving armourer comes on here to tell us different, I will now say that we do not know whether the iron delivered by Black Buck was of US or UK provenance.