5 In the case of the Stockwell Station Enhanced Refurbishment, London Underground and Tube Lines disagreed on 26 areas where Tube Lines originally agreed to carry out work, but later decided against doing so. For example:
■ Tube Lines thought it sufficient to replace or patch repair 10 per cent of the wall tiling, while London Underground requested that Tube Lines perform a full tile replacement.
■ Tube Lines planned to put new lamps in the existing station lighting, while London Underground requested full lighting replacement.
■ Tube Lines proposed to patch repair damaged floor tiles, while London Underground expected replacement of damaged tiles.
6 We found that these types of disputes occurred repeatedly during work on the early stations, delaying progress. London Underground engaged both Metronet and Tube Lines in an attempt to address these problems. In July 2005 the parties agreed a set of principles to help resolve scoping problems. This resolved many problems on Tube Lines' stations work, but was not successful in solving disputes on Metronet stations.