2015 saw over a million migrants and refugees make their way to Europe, fleeing war, persecution and poverty.

Two refugee school children walk hand in hand at a camp in Dunkirk
The reasons for the huge movement of people are many and complex - as are the reactions of people in host nations worried about perceived effects on security and infrastructure.
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Here are nine Twitter accounts to follow to help you gain a broader understanding...
1) UNICEF
2) Yannis Behrakis
3) Harry Leslie Smith
4) Charlotte Alfred
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5) Peter Bouckaert
6) George Butler
7) MSF Sea
8) Patrick Kingsley
9) Fabio Bucciarelli
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The chart above shows the the origin countries of the 19,196 people who claimed asylum in the UK from January to July of 2015.