On 12 February 2007, Metronet announced that they had leased the track and would be refitting part of it to test the next generation of air conditioned tube trains.
In May 2007, the company also bought the Romanian ISP Metronet based in Giurgiu, Romania.
On 7 June 2007, Metronet announced that the contract for operating and maintaining the test track had been awarded to Serco Assurance (formerly Serco Railtest), based at the Railway Technical Centre in Derby.
The charity has a strong record of forming partnerships with stakeholders (Transport for London, Metronet, Highways Agency, Land Securities and Kensington Housing Trust), public and private organisations (BBC, BT Group), and local authorities (Royal Borough of Kensington and Chelsea, Westminster City Council, Suffolk County Council, London Borough of Hammersmith and Fulham) to tackle regeneration schemes in run-down sites in the city.
The £850 Million contract was issued to Westinghouse by Metronet, and was for the resignalling of eight of the London Underground lines.