2 Bramley apples, peeled, cored and diced
4 eating apples (a sharp, crisp variety such as Braeburn), peeled, cored and cut into large chunks or slices
250–300²µ/9–10½´Ç³ú blackberries (frozen is fine)
1 lemon, zest and juice
375g/13oz plain flour, plus extra for dusting
50²µ/1¾´Ç³ú icing sugar
75g/2¾oz granulated sugar, plus extra for sweetening and dusting
200g/7oz salted butter, chilled and diced
1 large free-range egg, separated, plus 1 large free-range egg yolk
vanilla ice cream, clotted or single cream, to serve