As there are a limited number of stalls in the Chapel, only the most senior Knights and Dames Grand Cross are installed. A stall made vacant by the death of a military Knight Grand Cross is offered to the next most senior uninstalled military GCB, and similarly for vacancies among civil GCBs. Waits between admission to the Order and installation may be very long; for instance, Marshal of the Air Force Lord Craig of Radley was created a Knight Grand Cross in 1984, but was not installed until 2006.