On Sunday, protesters dressed in badger masks gathered outside the Houses of Parliament to protest against the plans to cull thousands of badgers.
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A person familiar with the negotiations said the settlement would be worth 44 million US dollars (£35 million).
Assange has been charged in the US with receiving and publishing thousands of classified documents linked to the wars in Iraq and Afghanista
Attorney general William Barr has been given the power to declassify documents related to the probe.