Disruption on South West Trains between London Waterloo and Alton, and between Guildford and Ascot due to earlier lineside fire at Aldershot.
Some trains are running via Aldershot but cancellations and delays of up to 40 minutes are possible until around midday.
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Jams Wright has the latest forecast for the west of the Meridian region.
James Wright has the forecast for the east of the Meridian region.