Destone the prunes, and make a small 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/375°F/gas 5 and remove the devils from the fridge. Cook for 15 to 20 minutes, or until the bacon is crisp. Serve immediately.