map of the branch showing the original alignment c.1921 Problems with the tunnel began almost immediately after completion. Several sections had to be patched up over the years but in November 1918, partial collapse caused the line to be closed for almost a month. While repairs were underway, the coal traffic was important enough to justify wagons being exchanged between locomotives while inside the tunnel, repairs being carried out by men working on a timber platform with just enough room for the wagons to pass underneath. After the NSR was
absorbed into the
London, Midland and Scottish Railway in 1923, problems with the tunnel became even more commonplace and construction of a new deviation line finally began in 1932. This skirted the high ground to the east and joined up with the old formation again just outside Cheadle station; this new alignment was opened in 1933. The tunnel portals were bricked up and the track from the south was lifted soon after, but the northern section of the old line remained in use as a
backshunt to New Haden Colliery; all trains to and from the latter would thus need to reverse at Cheadle. The southern portal was used as a small private coal mine which operated from 1983 to 1991 and even though it is bricked much of the mining equipment remains inside the tunnel. By the beginning of
World War II the passenger services had reduced to only two trains per day each way, with five on Saturday. In a further blow, New Haden Colliery was closed in 1943 after the
Ministry of Fuel and Power decided to move the 500 miners to more efficient pits in aid of the
war effort, and its traffic of 3,000 tons per week was lost. However, a
brickworks adjacent to the colliery plus an increasing amount of
sand traffic from nearby quarries, most of it delivered by road to Cheadle, provided a lifeline. ==Under British Railways==