Although the branch handled a reasonable volume of freight, passenger services on the line were never especially successful and the Great Central Railway, which had absorbed the WMCQ, discontinued them on a 'temporary' basis in 1917. They were never restarted. As a result of the Railways Act 1921, the GCR was absorbed by the London and North Eastern Railway, Brymbo becoming its most "westerly" outpost. The branch, sections of which had a 'difficult' combination of sharp curves and steep gradients, was worked by J58, and then by four Kitson & Co. J60 class locomotives based at Wrexham, later being replaced by J94s.