"A staggering gap of £400 million exists between the Mayor's calculations and the true cost of further upgrading the Tube. With the Mayor and Transport for London having no contingency for funding this gap it is hard to see what options the Mayor has other than raising fares further or cutting back on the Tube upgrades.
"The arbiter's decision also raises questions as to how the current programme of upgrades will be completed by Tube Lines when there is already a dispute between London Underground and Tube Lines over work now taking place totalling £500 million.
"Gordon Brown's discredited PPP has been nothing but a lawyer's paradise with its horrendous bill now being made by Londoners."
