Destone the prunes, and make a small an incision. Season the almonds with sea salt and drizzle with oil, then stuff inside the prunes.
Halve the rashers of bacon across the middle, then wrap each prune in a piece. Place the devils on a lined baking tray, cover and chill.
When ready to cook, preheat the oven to 190ºC/gas 5 and remove the devils from the fridge. Cook for 15 to 20 minutes, or until bacon is crisp. Serve immediately.