MPs are questioning rail bosses about what they plan to do to solve the problems caused by what is believed to be britain's biggest landslip following the recent flooding.
Eighty metres of the embankment at Botley in Hampshire has collapsed in the torrential rain.
Trains are being diverted along the south coast adding half an hour to journeys along the line through London, Eastleigh, Fareham and Portsmouth.
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Tuesday night's weather for the east of the region
Tuesday night's weather for the west of the region