2.13 London Underground did not have a breakdown of Metronet's high level budget for the stations programme, which made it difficult for London Underground to understand how additional work beyond the contract as bid was affecting the overall affordability of the programme. In the case of the Bow Road station modernisation, London Underground required the replacement of some elements of the station, which were considered by Metronet to be "fit for purpose and not expected to require significant maintenance before the next scheduled station refurbishment" (Appendix 5).