Editing Gospel Oak to Barking line (section)

=== New link to Gospel Oak ===
During 1981, the situation began to improve when electrification and upgrades to the line out of {{rws|St Pancras}} (later part of [[Thameslink (route)|Thameslink]]) displaced the line from Kentish Town. A new link to Gospel Oak was built and the hourly service from Kentish Town was replaced by the current route from Gospel Oak with two trains per hour. The service remained relatively unreliable, largely due to the age of the rolling stock used, which were initially Class [[British Rail Class 115|115]] and [[British Rail Class 108|108]] units, replaced in the early 1990s by Class [[British Rail Class 117|117]] and [[British Rail Class 121|121]] units.{{Citation needed|date=November 2007}}