 The new rolling stock was of wooden frame construction and a conservative design, with individual compartments throughout (without corridors) and offering both first- and third-class accommodation.The electric multiple units were all based at a new depot, located just south of Altrincham and Bowdon station on the site of the original MSJ&AR Bowdon terminus.The new trains began test runs in 1930 and on 11 May 1931 the London Road to Altrincham local service became fully electric.