Place everything apart from the flour and the pork into a mixing bowl and mix well. Add 250ml of water.
Add the pork and using your hands mix the marinade around the pork and make sure the marinade is higher than the pork so that it feels like it has drowned it.
Place it into the fridge for 2 hours to marinate.
Drain the pork from the watery marinate and place in the Instant Pot. Add to the instant pot a drizzle of olive oil over the pork and sprinkle with salt and pepper.
Cook on the slow cooker function for four hours.
Once it is cooked remove the pork from the Instant Pot and place it on your chopping board. Pull it apart so that it resembles pulled pork.
Add your old marinade to the slow cooker with ½ of the pork juices. Move it onto the sauté function and add a little corn flour until it has thickened, doing it slowly a bit at a time. This will then develop into a lovely thick homemade barbeque sauce.
Place the pork into bread buns and pour over the barbeque sauce.