For the airlines that I work with at Heathrow ....
On one they have a baggage bin which contains only crew bags. It is offloaded almost first, and then left at the rear of the aircraft; the coach collects the bags, and then the crew when they are ready. On the outbound flight they are delivered to the rear of the aircraft, and then loaded into the First Class baggage bin.
On another one (actually, two others) the bags are loaded loose into the Bulk hold in the rear of the aircraft.