Home Secretary Theresa May has told MPs: "We won't be rolling out the ['go home'] vans. They were too much of a blunt instrument."
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163,000 French and 143,000 German soldiers were killed in the 10-month battle in 1916.
As many as 700 migrants have been died after three consecutive days of shipwrecks off the coast of Libya, the UN Refugee Agency has said.
The fire broke out on Sunday morning at the home for 35 residents in Litochki, a village 25 miles north of Kiev.