I think it's some sort of fruity frogspawn on pancakes in that photograph.
Quick notes on making trifle for those brave enough to try now.
First, make sure you have an entirely clear space and plenty of room in the fridge.
If you have potentially floaty sponges, you soak them first by holding them in a bit of the jelly or in booze and that makes them heavy enough to sit on the bottom of the bowl - as a small amount of jelly cools down more quickly, they will most likely stick. Then add the rest of the jelly and bung the bowl into the fridge.
If you're making custard, make sure nothing is too hot. If it's the Bird's version, it doesn't do anything for ages and then suddenly starts thickening around twenty seconds after you've decided 'this isn't working, where can I get custard from, this is too hard'. If you turn up the heat at that point, there will be a disaster reminiscent of what breastfed babies punt out of their bums. So be brave and wait those extra few seconds for smooth custard. Let it cool and then gently add it to the jelly sponge mixture. Put it back into the fridge.
Don't overwhip the topping. I'd describe the ideal texture as soft and pillowy, floppy like shaving foam once you've added a small amount of water to it. Overwhipped feels tight and almost squeaky. Just stop.
If you're using double cream, add some vanilla and a little icing sugar to it. Take the bowl out of the fridge and gently flop the cream/topping onto the top.
Put it back into the fridge. Don't feed everybody too much tea, as this is a massive thing that needs to be enjoyed. When ready to produce, bung on the decorating shit and don't forget the biggest dishing up spoon in the world.
Put bowls and spoons out first before you bring in your magnificent creation and bask in the glory of everybody's admiration ignoring the claims of not liking jam or booze or jelly or fruit or whatever the fuck they have a problem with. Eat. And Eat. And Eat. In this case, the phrase ad nauseum is perfectly appropriate.
Don't forget to put the remainders back in the fridge. You might never want to eat trifle again after the first bowl or two, but it actually tastes fucking amazing on the next day when it's cold all the way through. The custard tastes like ice cream without the headache, for example.