At Redhill, you seem to be an AWFUL long way from the airfield on the 'standard' circuit, both downwind and on base leg, but as others have said, this is dictated by noise abatement requirements rather than a delibaerate wide circuit.
When training in Air Cadet gliders, I was taught to fly '45 deg' circuits ie you maintain a 45 deg angle between the aircraft and the airfield boundary at all times. This gives you an odd shaped circuit of course, because as you descend down wind, you fly closer and closer to the airfield, but it ensures you can always land back on the airfield. You also got a b......ing if you went too far beyond the downwind boundary!