Two migrants from the Sudan protect themselves from the rain as they wait near a road where lorries pass in Calais, France May 19, 2015 after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

Dozens of migrants gather in a field as they eat a meal distributed in Calais, France May 19, 2015 after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

A slice of bread is given to a migrant (R) as part of a meal that was distributed in Calais, France May 19, 2015 after he travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

A migrant rolls tobacco into cigarettes to be sold in a store in makeshift tent city located in a field in Calais, France, May 19, 2015 where migrants gather after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

Migrants are seen with bicyles in their makeshift tent city located in a field in Calais, France May 19, 2015 after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

A Calais city sign is seen near a fenced parking area in Calais, northern France, May 19, 2015 near where migrants gather after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

A migrant walks between foodstuffs inside a store in a makeshift tent city located in a field in Calais, France, May 19, 2015 where migrants gather after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

A tube of tooth paste and a tooth brush hang outside a makeshift shelter in a field in Calais, France, April 29, 2015. Migrants, principally from Eritrea and Sudan gather in this northern French port city after travelling from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol TPX IMAGES OF THE DAY

Migrants work to construct a makeshift shelter as they gather in a tent city in Calais, France May 18, 2015 after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

Dozens of migrants queue for the distribution of their daily meal in Calais, France May 19, 2015 after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

Shadows from migrants are cast on a makeshift shelter with the written word "Refugee" in Calais, France, April 30, 2015. African migrants, principally from Eritrea and Sudan, gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

Three Sudanese migrants who arrived only days ago pose in front of the wood structure they are building near tents and makeshift shelters in Calais, France, April 30, 2015. Migrants, principally from Eritrea and Sudan gather in this northern port city after travelling from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

Migrants form a circle as they use a generator to charge mobile telephones at a makeshift camp in Calais, France, April 30, 2015. African migrants, principally from Eritrea and Sudan, gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

Men work on a fence to stop migrants from reaching the ferry harbour in Calais, France, May 19, 2015. More than 2,000 migrants gather in Calais after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. A series of disasters in the Mediterranean in which hundreds of migrants from North Africa have drowned after attempting to cross the sea in overcrowded and unsafe vessels has sharpened international focus on the issue of migration into Europe.The European Commission is planning to legislate before the end of the year to ensure the burden of housing immigrants is shared across the bloc, according to binding quotas based on criteria such as economic health and population. REUTERS/Pascal Rossignol

Sudanese migrants share a meal they prepared at the makeshift camp in Calais, France, April 30, 2015. African migrants, principally from Eritrea and Sudan, gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol TPX IMAGES OF THE DAY

Migrants from Africa, Afghanistan and Syria queue for an evening meal at the Jules Ferry day center in Calais, France, April 29, 2015. African migrants principally from Eritrea and Sudan gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

Migrants walk on the road with a push cart to recover materials for their makeshift shelters as they enter the city limits of Calais, France, April 30, 2015. African migrants, principally from Eritrea and Sudan, gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

Migrants from Africa, Afghanistan and Syria queue for an evening meal at the Jules Ferry day center in Calais, France, April 29, 2015. African migrants principally from Eritrea and Sudan gather in this northern French port city after they travelled from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Pascal Rossignol

A migrant enters a makeshift shelter in a field near a hand-written sign with the words of Martin Luther King, Jr., "We must learn to live together as brothers or perish together as fools", in Calais, France, April 29, 2015. Migrants, principally from Eritrea and Sudan gather in this northern port city after travelling from the Mediterranean northwards in the hopes of crossing the English Channel and seeking asylum in Britain. After up to 900 people drowned trying to reach Europe from Libya last week, EU leaders tripled a naval search mission in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. Picture taken April 29, 2015. REUTERS/Pascal Rossignol TPX IMAGES OF THE DAY

A migrant from Eritrea covers his face near tents as he lives in a make-shift camp under a metro bridge in Paris, France, April 27, 2015. African migrants, principally from Eritrea and Sudan, sleep rough in some 80 tents and shelters as they make their way from the Mediterranean northwards towards Calais. Last week EU leaders agreed to triple funding for its naval searches in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Benoit Tessier 

A migrant from Eritrea covers his face as he sits near tents in a make-shift camp under a metro bridge in Paris, France, April 27, 2015. African migrants, principally from Eritrea and Sudan, sleep rough in some 80 tents and shelters as they make their way from the Mediterranean northwards towards Calais. Last week EU leaders agreed to triple funding for its naval searches in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Benoit Tessier TPX IMAGES OF THE DAY 

Migrants gather near tents as they live in a make-shift camp under a metro bridge in Paris, France, April 27, 2015. African migrants, principally from Eritrea and Sudan, sleep rough in some 80 tents and shelters as they make their way from the Mediterranean northwards towards Calais. Last week EU leaders agreed to triple funding for its naval searches in the Mediterranean to try to prevent record numbers of people drowning as they try to flee war and poverty in the Middle East and Africa. REUTERS/Benoit Tessier