The Gatwick Express is hoping to run a normal timetable between London Victoria and Gatwick Airport.
There are not engineering works due at the weekend but users are being warned that congestion on the motorways around London may lead to some delays as people try to visit the capital for the Jubilee pageant.
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Wednesday morning's weather for the east of the region
Wednesday morning's weather for the west of the region
Tuesday night's weather for the east of the region