4 large Bramley apples (about 1.2kg/2lb 10oz), peeled, cored and cut into small chunks
275g/10oz fresh blackberries
50驳/1戮辞锄 rolled oats
225g/8oz plain flour, plus extra for dusting
175g/6oz plain flour
30g/1oz caster sugar
150驳/5陆辞锄 caster sugar
100驳/3陆辞锄 demerara sugar
50驳/1戮辞锄 hazelnuts, roasted and chopped
125g/4陆oz chilled butter, cut into cubes
100驳/3陆辞锄 butter, at room temperature, cut into cubes
custard or double cream, to serve
1 large free-range egg, beaten