Tip the mixed fruit into a bowl with the sugar and gently pour over the tea. You should use roughly 2 strong tea bags. Stir everything and leave to soak overnight.
Heat the oven to 180 C / Gas 4 and grease a 2lb loaf tin with butter or use parchment.
Tip the flour and spices into a bowl and beat in the mixed fruit and juices from the tea. Add the egg and butter and mix until you have a well combined stiff batter. If it is slightly sticky then add a bit more flour. Pour the mixture into the prepared tin.
Bake for 1 1/2 hours until a knife comes out clean. Cover with foil halfway through baking to prevent the cake from getting too dark or burning.
Leave to cool in the tin for 15 minutes then remove and cool completely on a wire rack. If you cut this too soon the cake will crumble.