I did see a report this morning, which I can't now find, that the UK government had denied the US the use of RAF Fairford for strikes on civilian targets (couldn't see any mention of DIego Garcia). This would have had a significant impact on the scope of the strikes the US could have launched last night, had Trump gone down that path.
Well if check you'll find they did launch two strike waves out of Fairford yesterday, one of 3 x B1s and the other of a single B-52 (was supposed to be a pair but one scrubbed).
Both turned back when the ceasefire was announced, the B-52 landed back a few hours ago with its full load of JASSMs still aboard.
Video
Presumably a wave was planned out of DG, but we have no means of tracking those.