Supporters of the far-right British National Party and English Defence League have erected gallows outside the Old Bailey as part of a protest demanding capital punishment for the men who murdered Fusilier Lee Rigby.
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Mavis Eccleston, 80, was acquitted of her husband’s murder last week.
European Commission president Jean-Claude Juncker said the UK would be responsible for the consequences of Brexit.
The study is expected to warn of the impacts of melting ice and permafrost.