Brockley Hill, Stanmore, is an area of high ground on the outskirts of North London, England. The hill, which rises to 136 metres (446 ft) above sea level, is traversed by the A5 road. It follows the course of the Roman road known as Watling Street. The hill is also associated with the Roman archaeological site called Sulloniacis. The Royal National Orthopaedic Hospital is based at Brockley Hill.