One of the outcomes of the Railtrack fiasco - unless would-be bidder WestLB comes to the rescue - is that the successor company is certain to pay more for its borrowings. Initially, it looked as if this financing cost would be 3% above the cost of gilts of the same maturity, as against the 1.31% premium paid by old Railtrack. With Byers now aiming for a double-B rating, the likely cost would be 2.35% or 1% more than previously. This is a point which the Shareholders Action Group, representing Railtrack's bigger investors, will put to Byers today