Violent protests took place in Athens today as German Chancellor Angela Merkel - who is a widely disliked figure within the country - arrived in Greece.
More top news
The star celebrated his 70th birthday with his family before attending a celebrity-filled bash held in his honour.
Douglas Carswell told ITV's Peston On Sunday he wanted to "support" the government as a "critical friend" but refused to rule out a return.
Several of victims had life-threatening injuries, police said.