2 lemons, grated zest only
1–2 tbsp apricot jam, warmed
50g/2oz chopped candied peel
100²µ/3½´Ç³ú currants
100²µ/3½´Ç³ú glacé cherries
450g/1lb marzipan
2 tsp ground mixed spice
225g/8oz light muscovado sugar
225g/8oz self-raising flour
225g/8oz sultanas
225g/8oz butter, softened, plus extra for greasing
4 large free-range eggs
beaten free-range egg, for glazing