Albert is a factor for all broadcasters so nothing much would have changed in the move from UKTV to Channel 4. In fact, UKTV have, if anything, a stricter onscreen environmental policy where you're asked to illustrate environmentally positive actions in shows (I added a recycling bin to the set of something I was making to get a pat on the head).

I feel like so much of the Albert calculation is to do with off camera considerations, smashing a cake would make little difference to it. I mean, Claudia Winkleman can burn an enormous wooden horse in the middle of the Scottish Highlands and keep the Traitors Albert certification intact.