Easy trifle

Name: Easy trifle
Prep time: 20 min
Cook time: 6 min
Total time: 26 min
Cuisine: British, European
Ingredients: 500 g pack frozen black forest fruits; 213 g tin peach slices in fruit juice, drained; 1 tbsp icing sugar, plus extra for dusting; 190 g raspberry swiss roll; 30 g soft amaretti biscuits, crushed, plus extra for decorating; 300 ml tub British fresh whipping cream, whipped until medium peaks form; 300 ml semi-skimmed British milk; 1 tbsp cornflour; 50 g Fairtrade white caster sugar; 2 medium British free-range eggs, lightly beaten; 1 tsp vanilla extract