I do wish the BBC had not included this bit as the conspiracy theorists have been triggered.
Those people would be triggered regardless of that reference being there.
If he'd said "We started with a rehearsal list of 23 songs..." and "...we've been running through the lighting changes for a few weeks now"
23? That's a 2 and a 3. And 2 + 3 = 5 - a clear reference to the 5-piece! And 'FOR a few weeks' - the FOR clearly means they'll be on FOUR songs together. It's happening!
I wouldn't be able to resist having some fun with it, I'd refer to a really helpful person being 'a total angel' and trying to resolve some thorny tech problem as 'we weren't sure we were going to hack it'