Aldshot is the male dormitory of Wexford Sixth Form. It is the male counterpart to the female Hawthorne dormitory, which is a separate building. It is also the site where male student Alistair Gilliam died in his sleep in 1989. Derek is the current housemaster of Aldshot, opposite Claudia (who is the housemistress of Hawthorne).
Little is known about the interior of Aldshot, because girls (such as series protagonist, Rory) are not generally allowed to enter. However, in The Name of the Star, Rory and Jazza sneak into the building after midnight. With the assistance of Jerome, the girls cut around to the back of the building unnoticed and ascend to the roof to await the copy-cat Ripper's next move.