Heat oil on medium heat, remove vegetable pieces best as you can brown oxtail about 2 minutes on each side. ( Do this in batches. Set aside, Add all the brown oxtail back in the pot with 2cups of liquid stir well to combine. Cook for 2 hours slowly. Stir well then add remaining 2 cups of liquid , stir well and taste for salt, add salt to taste , cover and cook for 1 hour. Then stir well add the butter and stir, add scotch bonnet pepper, all spice berries, bay leaves and stir well, add butter beans , carrots, fresh rosemary, fresh thyme and stir well to combine. Add the chopped vegetable seasonings that were seasoned with oxtail, (diced tomatoes, bell peppers and onions).Stir well to combine, cover and cook 15 minutes, add remaining 1/2 cup liquid by pouring it into the bowl the oxtail was seasoned in and swoosh it around to get all the goodness. Cover and cook 1 0minutes in the meantime in a bowl combine ketchup, brown sugar and Worcestershire sauce and using a fork mix well until sugar dissolves, add it to meat and stir well to combine cook for 10minutes stirring consistently.