Hehe, the best CBBC / Towers collaboration was when they got Wardley to appear on Going Live (or possibly Live and kicking, I forget), talking about the new "shark diving" coaster. All riders would have to wear SCUBA gear, and the cars would have a shark cage around them. The track would dive under the main lake, which would be filled with great white sharks. Naturally, they would have to add salt to the water, so the camera panned down to a massive pile of bags of salt.
.... Needless to say, it was an April fools joke.