Heat the grill of your oven to moderate.    Place the sausage onto a grill pan.  Grill the sausage beneath the grill for 15 minutes, turning occasionally.   Add the bacon slices for the last 5 minutes, turning them once they are golden on one side.  Remove and keep warm.  Place your cut tomato under the grill, bottom sides up.  Grill for about 3 minutes, flip over and season with some salt and pepper.  Grill for about 3 minutes longer.   Remove and keep warm.  Heat the vegetable oil in a skillet until hot.   Add the mushroom slices and cook until golden, giving them a stir once or twice.  Scoop out with a slotted spoon and keep warm.  Place the beans in a small saucepan and heat gently.   Crack the egg open into a small bowl and slide it into the hot fat in the pan.   (You may need to add a bit more oil.)  Cook over medium heat until the white is completely set and the egg is beginning to turn golden at the edges.  Remove to a warm plate and keep warm.  (If you are wanting over easy, then flip it carefully, cook for about 30 seconds and then remove to a warm plate.)  If you are having black pudding, fry it now in the residual fat in the skillet, until crisp on both sides.  Toast your bread and butter it lightly, cut into half diagonally.  Plate up the sausage, bacon, tomato, egg, mushrooms and beans.  Serve with the toast and black pudding ( if eating.)