50g soft butter, plus extra for greasing and to serve (optional)
Tip the fruit into a bowl with the sugar and orange zest. Pour over the tea, stir everything together and leave to soak overnight.
Heat oven to 160C/140C fan/gas 3. Grease and line the base and short sides of a 900g/loaf tin with 1 strip of baking parchment. Tip the flour and spice into a bowl, and beat in the fruit and soaking liquid. Add the egg, followed by the butter. Beat until you have a well-combined, stiff batter, then tip into the prepared loaf tin. Bake for 1¼ hrs, covering with foil or parchment if the top starts to get too dark. Check with a skewer - if it doesn’t come out clean, give it another 5-10 mins in the oven.
Leave to cool in the tin for 10 mins, then remove and leave to cool completely. Serve sliced and buttered, if you like.