A fire which led to an evacuation at Crawley Hospital has now been put out.
The fire started in a sixth floor store room. There are no reports of casualities.
50 firefighters were involved with tackling the blaze, which broke out just after 1330.
More top news
The RMT Union's comments come as it's announced a new operator will takeover the South West Trains franchise.
Monday's forecast for the west of the region
Monday's forecast for the east of the region