The 60 mph limit on the Up Shipley line between Skipton South and the former LMR/ER regional boundary at Snaygill, about a mile to the East. When I moved to Skipton in 1991, both lines on that stretch were limited to 60 because the LMR had declined to spend money on the life-expired jointed track which, by that time, had a lot of rotten sleepers, dipped joints and wet beds. As part of the resignalling and electrification programme in the mid-1990s, both lines were relayed with concrete-sleepered CWR and deep ballast. It was deemed necessary to retain the 60 limit on the down line due to the installation of 'closing-up' signals approaching Skipton....but the Permanent Way Supervisor at the time told me that Railtrack didn't want to go to the trouble and expense of doing the necessary paperwork to raise the up line limit, even though it was now fit for 90 mph and had the appropriate braking distance between signals. As a result, electric trains departing from Skipton to this day have to dawdle along at 60 mph almost half-way to Cononley before they can accelerate fully....and then cannot reach line speed (except for the London trains) because they have to start braking for the stop at Cononley.