The 51 three-car Class 185 units, together with nine two-car Class 170 units, replaced the Class 158 (North and South TransPennine Express routes), Class 175 (routes between Manchester Airport and Blackpool / Cumbria) and Class 220 / Class 221 Voyager trains (operated by Virgin CrossCountry on routes between Manchester and Edinburgh / Glasgow). To free up stock for services between Manchester Airport and destinations in Scotland when First TransPennine Express first took over these routes, the frequency of the Manchester Airport to Windermere route was reduced from December 2007.