1 lemon or orange, finely grated zest
75g/3oz caster sugar
2 tbsp demerara sugar
½ tsp mixed spice
150g/5oz mixed sultanas and raisins
8 thin slices white bread, crusts removed
100g/4oz butter, melted
300ml/½ pint double cream
2 free-range eggs
150ml/¼ pint milk