I expect this will just be a throwaway thing, perhaps whilst the Doctor tries to choose a new interior look for the TARDIS. It will probably only be one brief shot.
Even if it's not - it can't turn out that bad, can it? It's not as if we can really blame the Blue Peter competition for Peter Kay's performance! The idea behind the Absorbalof was basically good. I'm sure the props team will do a good job of making a kid's console sketch look good on screen. It will be fine!