Heat the oil in a large casserole dish with a lid. Add the onion and bacon, and cook over a medium heat for 15 mins, until the onion is really soft and starting to brown, and the bacon is crisp. Push to the side of the pan, increase the heat and add the chicken pieces. Cook for a few mins until the meat is nicely browned, but don’t worry if it’s not evenly coloured. Add the paprika, tomatoes, along with half a can (200ml) water, the barbecue sauce, herbs, a pinch of salt and a generous amount of black pepper. Cover with a lid, lower the heat to a gentle simmer and cook for 45 mins, stirring occasionally.