Rub the butter into the plain flour until it resembles breadcrumbs. Mix in the yeast and the turkey followed by the warm milk. Mix in the salt and pepper. Mix well until your mixture makes a nice dough. Knead the dough for about 10 minutes. Roll the dough on a clean but floury worktop.
In a mixing bowl mix together the spinach with the soft cheese and layer the top of the bread with it. Cover with the cheddar cheese and roll up the bread so that the cheese and spinach forms as the centre of the bread.
Place the bread in the air fryer on top of the baking mat. Cook for 180c for 20 minutes followed by 8 minutes at 160c so that it can be fully cooked in the centre.