Silver Plate B-29
The B-29 Superfortress "Silverplates" were designed around the two atomic bombs.
During World War II, the 509th Composite Group included 15 B-29s with special "Silverplate" modifications, and 1,800 men. The Silverplate B-29s had modifications necessary to deliver atomic weapons, which included an extensively modified bomb bay with pneumatic doors, special propellors, modified engines and the deletion of protective armour and gun turrets.
The group was commanded by Paul Tibbets who was one of the first pilots to complete a European tour, He was then a test pilot on the B-29 before being hand-picked to train and lead the bomb group.
The USA controlled all facets of the Atomic Bomb delivery and manufacture. The idea that they would hand it over to the RAF to deliver in their under-powered and obsolescent Lancasters is derisory. The B29 was a mature, next generation device and was in front line use (See the pictures of the hundreds of them on the four runways at Tinian)
I always thought that Lancasters at Enstone were used in flight refuelling tests.for ETO