How far does the road, also known as "Great Cambridge Road" go that is crossed by the Spital Brook?
Spital Brook:  The stream crosses the Roman road, Ermine Street, before going under the A10 and Cock Lane. A10 road (England):  Its southern end is at London Bridge in the London Borough of Southwark, and its northern end is the Norfolk port town of King's Lynn.
Its southern end is at London Bridge in the London Borough of Southwark, and its northern end is the Norfolk port town of King's Lynn.