The appalling state of Britain's railway stations is to be the subject of a hard-hitting report by MPs after the chief executive of Network Rail revealed how little progress had been made on rebuilding Birmingham's New Street station.
John Armitt, who heads the not-for-profit body responsible for the UK's rail network, admitted there was still no idea how much the project would cost.
He was giving evidence to the Commons Public Accounts Committee, which is preparing to release the results of its inquiry tomorrow.
New Street, Birmingham's busiest station, was not designed for the number of passengers using it and frequently faces the threat of temporary closure to prevent over-crowding.
Business leaders and councillors also believe it is ugly - and gives the worst possible welcome to visitors to Birmingham.
And the rail infrastructure around the station cannot cope with the amount of trains now using the line.
But although discussions about re-building New Street have been going on for decades, Mr Armitt revealed there were still no firm plans in place.
Giving evidence in the House of Commons, he said: "The plans for Birmingham New Street at the moment are of the order, depending almost on which day of the week it is, of anything from £200 million to £700 million which needs to be invested to turn it into a much more user-friendly station for passengers.
"We are working with others at the moment to see how that can best be effected, how you get that money into the station through developers, who will obviously benefit through the shop offices and housing and retail opportunities built around the station, and the money which then goes into the station fabric itself."
New Street would be competing with others for funding, he warned.
"We did an estimate of the money we believe needs to be invested over the next ten to 15 years in, in the first place, the larger stations across the network.
"If you just take the 50 largest stations we calculated that about £2.2 billion was needed to go into those stations."
Earlier this week MPs met business and council leaders in Birmingham's London "embassy", an office set up by the city council in Piccadilly, to discuss the problem.
Those attending included Andrew Mitchell (Con Sutton Coldfield), John Hemming (Lib Dem Yardley), Richard Burden (Lab Northfield), Gisela Stuart (Lab Edgbaston), Clare Short (Lab Ladywood).
Simon Murphy, chief executive of Birmingham Forward, which represents businesses in the financial and professional sector, said: "We asked them all to write to Alistair Darling, the Transport Secretary, to find out where we are on that.
"Having five business organisations there, the leader of the council and the deputy leader, showed we were all singing from the same hymn sheet and working closely with MPs in the House of Commons."