The left handers were on the procedure which descends from 5000 outbound for about ten miles or so(From memory)before turning inbound to establish on the ILS at platform altitude of about 2200(again from memory).The right handers were on the visual .The difference in circuit size is due to often being cleared to position visually into the circuit but having to maintain 4000 feet untill downwind to allow a departure .Once clear of traffic the choice is yours-extend outbound to lose the extra altitude our dangle everything and go for the "shuttle circuit"(more fun but arguably more "dramatic" for the punters).
Hope that clears it up!
