The B161 Harrow Road turns off High Road Leytonstone
The B161 connects Leyton and Wanstead in east London.
Until early 2018 it began on the A112 Leyton High Road, heading southeast along Francis Road to reach Warren Road. This section has now been declassified and partly pedestrianised.
The route now starts at a junction on the A106 Grove Green, following Cathall Road, which immediately bridges both the A12 Eastern Avenue and the Central Line. Soon we reach High Road Leytonstone (formerly the A11, now unclassified) which we cross at a right-left staggered junction. Continuing east along Harrow Road, we come to Wanstead Flats, which the B161 skirts to the south before ending on the A114 Woodford Road just to the north of Wanstead Park railway station.