Put the apples and pears in a pan with the sugar and 50ml water. Bring to a simmer, then gently cook, covered, for 15 mins or so until the Bramley apple has collapsed to a purée and the eating apple and pear are tender (stir to make sure it doesn’t catch on the bottom).
Stir in the cherries or cranberries for 1 min, taste and add a little more sugar if necessary.
* Can be chilled for 3-5 days.
* Serve with vanilla ice cream, if you like.