Crumble - You can freeze batches of crumble topping and through over tinned/frozen fruit if you need speed.
Bread and butter pudding - Butter 2 slices of bread, put in greased tin. Pop in maybe some fruit, banana, raisns, apple etc. Then out more bread and butter over the top. Whisk egg, milk, bit of sugar and spices then pour over. Cook in oven till crunchy on the top and squidgy in the middle.
Rice pudding - again can be frozen in batches, cooked in sloq cooker or microwave. When defrosting you can add jam, chocolate, fruit, nuts, museli, yogurt....
Pancakes
Scones - flour, dollop of marg, rub in. This can be frozen. Add milk/water then what ever you fancy: raisons, nuts, coconut, chocolate bits, apple etc and shove dollops (don;t bother with cuttes!) in the oven... Thy freeze really well too.
Spongy pud - 1 oz fat, 3 oz sugar, 4 oz flour, 4 eggs and what ever else you want: fruit, raisons, chocolate, ginger, spice, prunes are nice. Pop in loaf tin and bake.