Thanks everybody for your encouragement. I had made my own trifle so I knew what was in it - fat less sponge, sugar free jelly, frozen raspberries (no sherry)! Custard made with skimmed milk and half the amount of sugar, with a sliced banana in to make up the sweetness. Usual whipped cream and a crumbled flake on top. I dished up, so I could control my portion and no one noticed that I scooped jelly and custard and no cream into my bowl.
So, all in all, I am feeling very pleased with myself! I didnt count the calories at the time, but I will work that out tonight so I am more prepared for next time trifle is on the menu 👍