Copied New Shoot's opening words onto another forum I'm on. Up came the forum's techie with the following memory
"Waitrose have a bit of history with this sort of thing, mostly because for a few years they've partnered with Heston Blumenthal to make a range of (expensive) weird Christmas "treats" (definitely needs the quote marks round that word!). Things like bacon flavoured trifle, Christmas puddings with whole oranges hidden inside them, fig flavoured cheese cakes that looked like they were covered in ash, etc, etc.
Thankfully they still had "normal" stuff so I could scoff mince pies that tasted like, well, mince pies, rather than ones with pine scented sugar dusting that smelt remarkably like loo rim block"
Yep I sort of remember some of those things appearing in various social media and on radio.