In the days of RAF Manston, the traffic pattern was;
Main runway (10/28) with light a/c at 1000', large/jets at 1500'.
Grass runway (06/24), just to the north of the main, with light a/c at 800'.
Gliders operating from the Northern Grass in their own circuit, or 202 Sqn Sea Kings operating circuits on the Northern Grass area.
All three circuits were operated simultaneously. Being examined by the Cat Board in Local one day, the examiner unplugged after 20 minutes saying that he couldn't get the mental picture of what was happening (a combined 13 a/c in three circuits). Fun days.