[James2001]

Didn't some of the later episodes of Big Break sit on the shelf for years before airing? There's the 2001 episode on the iPlayer that has a 1998 copyright!

Not that sitting on the shelf for years is particularly uncommon with gameshows. We even had things like the final TVS series of Catchphrase not being shown until after TVS had gone off air (and there were some previously unaired episodes from the penultimate TVS series tacked onto the end of that run as well).