Snow at York Station, 1991.
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Workers clearing the platform of snow at York station, by Chris Hogg, 8 February 1991. The platform needs to be cleared to prevent the risk of passengers or trolleys slipping. Snow is a particular hazard to the railways, because it can come suddenly and can drift quickly, burying trains, making wheels slip and causing severe delays. Snowploughs are used on the railways, particularly in Scotland and on high ground.