Boneless pork shoulder requires slow and steady cooking, so set the slow cooker to low heat and cook for eight hours. You can assemble it in the morning and it will be ready right when you finish ...
Bring to the boil then turn off the heat. Transfer the mixture to a medium slow-cooker pot. Cover and cook on a low setting for 8–9 hours. Stir in the milk and cook for 30 minutes before serving.