Chuck into a large pot the fruit, water, mixed spice, brandy, butter, vinegar and cinnamon and bring to boil. 

Remove from heat and add baking soda and condensed milk. 

Cool, then add flour and baking powder.  

Mix together and bake (fan bake preferably) in tin or glass container for 1 ½ hours at 150c. 

I use a Pyrex glass dish 29x22x9cm.  

Very nice moist cake that keeps well (if you can restrain yourself).