If Britain leaves the EU, it would shake the union's foundations and destabilise it politically.
The prime minister has promised to reduce net migration to 'hundreds of thousands'.
The prime minister will make his case as EU leaders meet in Brussels for two days.
Queen and Duke of Edinburgh will also visit site of Bergen-Belsen Nazi concentration camp.
Video footage shows migrants trying to break into lorries bound for Britain, one day after strike at the port.
Cameron criticised the welfare system saying low earners were being taxed and then paid back in benefits.
The European Parliament president urges UK to choose compromise over confrontation.
Five of the most likely changes for Brits if a Brexit takes place.
Shadow foreign secretary Hilary Benn gave a calm and assured performance at the dispatch box for Labour.
The government has been able to avoid embarrassment over its EU referendum bill.
The former defence secretary wants a purdah period to be enforced ahead of the vote.
US First Lady will speak at an East London school about the importance of education for girls.
The draft legislation on the promised historic vote will reach its committee stage in the Commons.
Freedom of the press will not be safe in the UK under new domestic surveillance laws say journalists
Media mogul's autobiography The Real Deal details his rise from poor Jewish boy to billionaire.
Frances O'Grady says workers could be turned off an 'In' vote if their rights come under attack.
Prince Harry leads service on Thursday to remember British armed forces who were killed in Afghanistan.
David C Bannerman MEP, a co-founder, spoke to IBTimes UK after the group's first meeting in Europe.
IBTimes UK takes a look at this week's Westminster gossip and political news.
G7 decarbonization pledge "critical turning point" making Paris climate deal "realistic" says UK climate envoy
British government plans to significantly reduce immigration from outside European Union
Acting Labour leader urged Cameron to 'show a bit more class' during the bout.