Air-fryer loaded cheese & pancetta potato skins

Ingredients

• vegetable oil
• 4 Maris Piper, Russet, red skin or baking potatoes, scrubbed and pierced all over with a fork
• fine salt
• 2 tablespoons butter
• 100g mixed grated Cheddar and mozzarella
• ground black pepper
• 100g diced smoked pancetta
• 4 spring onions, thinly sliced
• optional: crème fraîche, to serve