Crush the digestive biscuits in a food processor or in a plastic bag with a rolling pin, then put them in a large mixing bowl. Chop each marshmallow into 4 pieces and add to the bowl with the cherries and 175ml condensed milk. Mix until the ingredients are well combined and you have a sticky mixture. If it’s too dry, add a splash more condensed milk.

Sprinkle most of the coconut over a large piece of cling film (or foil). Tip the mixture onto the coconut and shape into a long sausage. Sprinkle more coconut over the top of it and wrap the cling film tightly around, twisting the ends together. Leave in the fridge to chill for 4-6 hrs, then cut into 15 slices and serve. Will keep in the fridge for up to 1 week wrapped in cling film.