The Beeching Report, had it been implemented fully, would have seen passenger services over Copy Pit being withdrawn but the line retained. At the time the traffic surveys were done for the report, Copy Pit was carrying between 10,000 and 50,000 tons of freight each week. With the new yards at Rose Grove at one end and Healey Mills at the other, it was anticipated that freight would continue to be at healthy levels over Copy Pit.
The Settle & Carlisle was to have been closed, and the local passenger service over the Little North Western withdrawn but the line was to have its remaining passenger services "modified." Beeching rarely went into further details as to what exactly that meant, so we can only speculate. Skipton to Colne was to have remained open, including local services. Interestingly, Map No 1 - Density of Passenger Traffic - shows the Skipton to Colne line as being busier than the section between Rose Grove and Colne, 10,000 to 50,000 passengers per week and 5,000 to 10,000 passengers respectively.
The Skipton to Colne line, however, did not appear on the map of Barbara Castle's 'Basic Railway' and was put through the closure process with undue haste, closing early in 1970. Whether this was a mistake or not has been the subject of several threads!
The Preston Power re-signalling was designed in the late 1960s and work in the East Lancashire area started in 1970. Although Rose Grove yard failed to live up to Beeching's expectations, through freight traffic continued to be healthy over Copy Pit and the Calder Valley towards Victoria, which (presumably) is why Copy Pit was fully resignalled and remained double track. It was only later in the 1970s, when the coal traffic between Lancashire and Yorkshire dwindled, that freight over Copy Pit declined.