The line to Barnet stopped short at Underhill, south of the main village located at the top of the hill. As Barnet was a larger village than Edgware and new residential development at Finchley grew at a faster pace than on the original line, the branch line quickly became the dominant route. Direct services from London ran to High Barnet and a shuttle service was operated between Finchley and Edgware for most passenger journeys on that section, which remained a single track.