New figures reveal rail passengers in the Thames Valley are wasting time sitting on delayed trains for more than four hundred hours a year - because the signalling system is so old and unreliable.
Now £350 million pounds is to be spent on a new state of the art system for the Great Western mainline. One hundred and twenty miles of line will be given new signalling along the route from Slough to Bristol, Reading to Newbury and Reading to Oxford. But the work will not be complete until 2015. Our Transport Correspondent Mike Pearse reports.