The through lines were served by Platforms 3 (in the down direction) and 4 (up). The lines continued through the back wall of the station and immediately crossed over Brook Street by way of a bowstring girder bridge with an span. This extension eventually fell victim to Dr Beeching's "Reshaping of Britain's Railways" report. It was closed to passengers in March 1965 (at the same time as the route via Otley to Leeds) and to all traffic at the beginning of 1966, reducing Ilkley to a terminus once more. The track alongside both Platforms 3 and 4 remained in place for a time following closure as a through route, with Platform 3 seeing occasional peak-time passenger use, and Platform 4 very occasional engineering use as a stabling siding. The pedestrian subway leading from the main station concourse to Platform 4 and the back entrance of the station on Railway Road was closed in 1983 owing to the deterioration of the glass roof above it. Much of the glass in the main roof at this side of the station was removed at this stage, and Platforms 3 and 4 were permanently closed and the track lifted.