Sandhurst Military School
From Tardis Wiki, the free Doctor Who reference
Royal Military Academy Sandhurst — often refered to as just Sandhurst — was a training centre for British Army officers.
Alistair Gordon Lethbridge-Stewart attended Sandhurst with Billy Rutlidge. (TV: The Web of Fear) According to Jo Grant, he was reluctant to talk about his time at Sandhurst. (COMIC: Target Practice)
In the mid-2000s, Lethbridge-Stewart was present at Sandhurst when he was taken to the Disunited Planets. (COMIC: The Warkeeper's Crown)