The £9bn modernisation of the UK's West Coast mainline, linking London and Glasgow, has been completed.
Network Rail says services will be improved and journey times cut by up to 30% - but not quite as fast as in this video clip.
With the help of a footage which has been speeded up, watch the journey from London to Glasgow in just five minutes.
For technical reasons a short stretch near Milton Keynes is missing from the route.
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