PS You could make the custard without the sugar. I also have it with just a spponful of jam in the middle of the custard (like we used to get with semolina pudding in school) - it sweetens it.

The downside is I don't know if custard is gluten free. Birds eye also has a colouring agent in it, which might not be good, but I haven't looked it up. I'd like to find some organic custard powder. I also want to look up vanilla sugar, which is available at tesco, as that might be nice in it, but I don't know if vanilla is good or bad to eat.