Peel, wash and thinly slice the potatoes. Heat the oil in two large frying pans and fry the potato slices for 8-10 minutes until golden brown. Turn occasionally. Cut bacon into small cubes and fry for the last 5 minutes.
Season with salt and pepper. Drain mixed Pikkles on a sieve. Mix mayonnaise and yoghurt. Cut Mixed Pickles, except for a few for garnishing, into pieces and stir into the mayonnaise.
Season with salt and pepper. Arrange roast beef and fried potatoes on plates. Add the remoulade extra. Garnish with the remaining mixed pickles and parsley leaves.