Preheat oven to 180°F or Gas Mark 4

Peel, core and slice the apples to 1-2cm thick (chunks if you desire)

Place the apples in a saucepan with 50g sugar and 2tsp of water cook until apples go mushy then place into an ovenproof dish

Put the remaining sugar, flour and butter into a mixing bowl using your hands mix until you get large crumbs sprinkle evenly onto the apples and place into the oven for 30mins