|Location Map ( geo)|
|From:||Mount Pleasant (TQ310824)|
|To:||Kings Cross (TQ304830)|
|Distance:||0.6 miles (1 km)|
|Met:||A201, A401, B502, A501|
|Now part of:||A201|
|Route outline (key)|
The B503 was a short route in central London.
It consisted of the part of Farringdon Road north of the A401 Roseberry Avenue (the part to the south was the A201). Continuing north, the B503 then headed along King's Cross Road to end on the A501 Pentonville Road.
The road still existed in the 1950s but has since taken over by the A201.