|From:||Old Street (TQ330825)|
|To:||East Road (TQ328830)|
|Via:||Pitfield Street, New North Road|
|Length:||0.4 miles (0.6 km)|
|Route outline (key)|
The B101 is a short (650-yard) road just north-east of the City of London. It is one-way throughout its run northward from the A5201 Old Street to the junction between East Road and New North Road on the A1200.