Emma batters Britain: Families are ordered to EVACUATE as snow gives way to lethal rain and black ice turns UK roads into ‘death traps’ while 50mph storms continue to rage across the country

Black ice will continue to blight Britain's roads today as snow continues to fall across the north-east of England and Scotland as well as Northern Ireland.
A yellow weather warning for ice remains in place until 11am across the whole of the UK, with a yellow warning for snow also in place for the north-east of the Scotland and England where another five centimetres of powder are set to fall.
Villagers in Devon have been told to evacuate their homes if possible or at the very least to board up their properties to shield themselves from Storm Emma.
Both Devon and Cornwall are at risk of flooding as western regions expect winds of up to 50mph, dropping to between 35mph and 40mph later on Saturday as the country recovers from the worst snow storms since 1991.
Rain and sleet are forecast to hit most parts of the UK not affected by snow, which is also set to fall in Dartmouth and Exeter. Conditions in the capital will improve after 11am, when highs of 5C are expected.  
Passengers frustrated by delays have jumped from trains and walked down tracks near one south London station.
Southeastern Rail said it was dealing with a "serious trespass incident" after the doors on a train were forced open while it was stopped outside Lewisham station on Friday evening.
Power has been turned off while staff ensure the tracks are clear prompting severe delays, the company said.
British Transport Police, Metropolitan Police and London Fire Brigade are in attendance.
A Southeastern spokesman said: "There are currently severe delays to trains in the Lewisham area following a serious trespass incident.
"Several passengers have forced open the doors on a train and disembarked while it was stopped outside of the station.
"We've had to turn the power off for safety reasons, and Southeastern staff are currently working closely with Network Rail and the Police to clear the trespassers from the tracks so that we can get trains moving again.
"We completely understand that passengers on delayed and busy trains may be frustrated, but they simply must stay on the train for their own safety.
"These trespassers risk being electrocuted by the 'third' rail or hit by other trains. They're also causing significant further delay for other passengers that our staff are working hard to get home."
British Transport Police said in a tweet that "all available officers" had been deployed to evacuate passengers trapped on trains in the area.
Mick Cash, leader of the Rail, Maritime and Transport union said: "RMT members are out there working in appalling conditions on our railways tonight and they deserve nothing but total respect and support.
Emergency workers at Lewisham station after passengers frustrated by delays jumped from trains and walked down tracks.
Emergency workers at Lewisham station after passengers frustrated by delays jumped from trains and walked down tracks. Credit: PA
"Tonight's incidents have once again raised some serious issues about the capacity of Britain's railways to cope with added pressures from adverse weather.
"There must be a full and transparent investigation into the serious issues that have been raised on on transport services over the past week. Warm words from Chris Grayling just won't cut it."
A Network Rail spokesperson said: "At 5.35pm this evening, a train came to a stand near Lewisham Station due to ice on the conductor rail.
"Our team were on site manually de-icing the rail when at 6.45pm passengers began climbing off the train and onto the tracks.
"Safety is our primary concern and the conductor rail in the south east carries 750 volts of electricity, which is more than enough to kill.
"In the event of trespassers on the railway we have to turn the power off for their safety.
"It is incredibly irresponsible and dangerous to trespass on the railway and unfortunately this has meant we have to delay many other passengers who recognise the danger and stay on their trains.
"We worked closely with the emergency services to get passengers back on trains and as of 21.40 we were able to turn the power back on and trains are now able to move again in the area.
"However, passengers may experience residual delays during what has already been a testing day because of the adverse weather conditions for the whole transport network."
Southeastern said it had cleared trespassers from the tracks and restored power by 10.15pm, allowing trains to move again.