Below is an article published by BBC News:

A human-rights worker accused of spying in Angola has protested her innocence.

Sarah Wykes, 41, was arrested in the African nation on 18 February but later released on bail.

She returned to the UK last month but could still face trial as a charge of crimes against Angolan national security has not been dropped.

Ms Wykes, who is staying with family in Cumbria, claims there is no evidence to support the charge and is hopeful of returning to Angola to resume her work.

She was investigating corruption in the oil industry in the province of Cabinda for charity Global Witness when she was arrested.

'Innocent' claim

The exact terms of the charges against her have not been fully revealed but speaking to BBC Radio Cumbria she confirmed the case against her was still open.

"All I can say is that I believe I'm innocent of those charges and I believe there is no case against me.

"The case is still open but under Angolan law and under the Angolan constitution the kind of activities I was doing to promote transparency and good governance are protected."

Ms Wykes said she still wanted to return to Angola to continue her work despite the stress her arrest had placed on her family.

"We have some very good groups and individuals working very hard in Angola to try to improve the situation.