TARDIS exterior (Streets Doctor Who advertisement)
From Tardis Wiki, the free Doctor Who reference
A unique police box exterior design was used by the Doctor's TARDIS when the Fourth Doctor and K9 encountered Necros. It featured a siren lamp with the Streets logo. A unique TARDIS control room was also in use at this time. (TV: Streets Doctor Who advertisement [+]Loading...["Streets Doctor Who advertisement (TV story)"])