To alleviate the immediate financial pressures of the huge cost increases of the rerailing programme after Hatfield, Railtrack agreed with the government an acceleration of part of Winsor's financial settlement on 1 April 2001. This brought revenues forward into 2001 which were not due to be paid to the company until 2006. Winsor endorsed the acceleration. To achieve favourable accounting treatment for the revenues, the government agreed that its franchising arm, the Strategic Rail Authority, would set up a 50:50 joint venture company, known as Renewco. The accelerated revenues would be made available to Railtrack via that vehicle. The agreement was that Renewco would be set up by 30 June 2001; if not, Railtrack would have the right to apply to Winsor for an interim regulatory review.