Bloody hell, that was good! I reckon there was one fluffed line (Jack, right at the beginning, gibbered a bit, but then he meant to be in a panic, so it worked), and two bits of dodgy camera work, one where it wasn't quite pointed in the right direction and then shifted, and one where it wobbled. And as for it probably being one or two sets and not much action... They even managed stunts! (and sound effects, the Tube train going over...)
Geez, if that was live, they deserve every award going.
And it occured to me, live presenters have earpieces and someone cueing them in each time. Unless they were microscopic and invisible, none of the actors had anything like that, all the cues must have been visual signals.
The storylines might all be a bit farfetched, but that was superb craftsmanship and organisation. Makes you proud to be British...