Delays of up to 40 minutes on Gatwick Express between Victoria and Gatwick Airport due to broken down train at Clapham Junction and safety checks at Wandsworth Common.
There is no estimate for when a normal service will resume. Also affecting Southern.
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Southern Health will launch a full investigation into an alleged 'abusive' voicemail sent to Dr Sara Ryan, mother of Connor Sparrowhawk.
Direct rail services between Southampton and Brighton will be disrupted until the end of this week.
Wednesday morning's weather for the west of the region