 During the early 21st century, a heavy emphasis was placed upon participating in Britain's railway industry.From 2003 to May 2010, the company jointly owned (with Bechtel) Tube Lines, the consortium responsible for the maintenance, renewal and upgrade of the infrastructure, including track, trains, signals, civil work and stations, on three London Underground lines.In 2010, Tube Lines encountered a funding shortfall for its upgrades and requested that TfL provide an additional £1.75 billion to cover the shortfall; TfL refused and referred the matter to the arbiter, who stated that £400 million should be provided.