They probably purposely make it slightly outdated so that people outside of the studio can be alerted to the fact that something's wrong.
Also, can we take a moment to appreciate how Vernon Kay used to do a weekly maths question as an actual radio feature?
Interesting that the emergency "tape" is at least two years old. The fact that we've (probably) never heard it before just goes to show how rare technical breakdowns are these days (of course this was human error rather than a fault).
Here's a fun emergency tape incident from back in '09 with some '06 imaging shoved in for old time's sake.
I wondered that too, but when it came on again before the start of Phil's show, it seemed to start from the beginning with Clean Bandit and an ident. To be honest, I'm just surprised (and slighyly disappointed) that it's not Hey Ya by OutKast anymore.
It was also weird how as soon as the studio was taken off air a trail played, before the silence - I'm trying to work out how that happened. Anyone who knows more about radio engineering than me got any suggestions?