M5 (motorway)
From Tardis Wiki, the free Doctor Who reference
The M5 was an English motorway.
Junction 11a was located to the north-east of Gloucester, while Junction 12 was located just to the south-west of the city. Junction 13 was just west of Stroud and Junction 14 was located just north-east of Thornbury.
The M5 appeared on Mary Cooper's map of overflow camps in and around Wales. (TV: The Categories of Life)