Great Western mainline: what does a £10bn rail upgrade buy you?

The huge project overran and cost far more than planned, but passengers can expect more services and faster journeysIt has come years late, with bits missing and at double the price. But a landmark moment in one of rail’s most costly and controversial sagas, the Great Western mainline upgrade, may still give cause for appreciation this week, when an Inter City Express train carries passengers for the first time along an electrified section of the route.The train and, in particular, the ele