The LVR got a further Act in 1851 authorising a short north to east connection to the SWR at Stormy, east of Pyle. Steam power was prohibited from being used on it. The broad gauge connection, known as the South Wales Junction Branch Railway, was constructed almost immediately, and may originally have been intended as a transhipment siding. The Cefn Cwsc colliery and Ford's Works were located a short distance from the junction of the Junction Branch Railway on LVR territory, and extensions of the broad gauge were laid in to them. This resulted in a short length of mixed gauge and broad gauge track.