Police will be deployed to stations in London and the South East to prevent all but essential journeys out of Covid-19 Tier 4.
Transport Secretary Grant Shapps urged people only to come to train stations in areas under the toughest restrictions if they are "permitted" to travel.
It comes after huge crowds arrived at train stations in London last night, in the hours after Boris Johnson announced Tier 4 restrictions were to come into force.
Health Secretary Matt Hancock today said the behaviour of people trying to travel away from the capital was "totally irresponsible." Mr Shapps said: "It is incredibly important that people follow the guidance, stay at home and do not attempt to travel.