Does anyone know if any squadron's Lancasters besides those of 617 Squadron were fitted out to carry Tallboy bombs? Gregory Benford's The Berlin Project has an RAF Lancaster so fitted out, and with a mixed RAF - USAAF crew, dropping a "Little Boy" on Berlin early on the morning of June 6, 1944. They miss the "amateur painter" but severe enough other connections that the landings and initial moves inland go quite successfully; then things get nasty.
I ask because the US bomb was designed for the same shackles and spacing (found that out at Silver Hill when we visited the Enola gay restoration) as Tallboy.