[2] By 1867 it was carrying through trains from London Paddington to Penzance, and in 1876 the line became part of the Great Western Railway.

In 1931 work was undertaken to convert it to a flying junction which would then allow the down Bristol trains to cross over the up Castle Cary route without conflict.

On 19 July the signal box was moved 660 yards (600 m) west of the original junction where it had been standing, but it remained on the north side of the line between the railway and the canal.

Slow trains between Taunton and Castle Cary ran via Durston station to Athelney on the Yeovil Branch Line where there was another junction with the Castle Cary route, which meant that they ran through Cogload and Creech St Michael on the outer tracks.

A slight realignment of the up Bristol line at the same time allowed the junction to be moved and the speed limit raised to 90 miles per hour (140 km/h).

The two trusses are asymmetrical and different sizes as the bridge is constructed on the skew due to the angle that the two lines make to each other.