Cost of Great Western mainline electrification project triples to £2.8bn

Network Rail chief Mark Carne admits inadequate planning as public accounts committee bewails ‘staggering increase’The cost of electrifying the Great Western Railway mainline has tripled from the original estimate to as much as £2.8bn, an overrun that puts a host of other rail improvement schemes in doubt.Mark Carne, the chief executive of Network Rail, told the public accounts committee on Wednesday that the delayed project to electrify the London to Cardiff line would cost &p