Nelson Mandela's current and former wives 'like sisters'

The former wife of Nelson Mandela has told ITV News that she has a "great relationship" with his current wife, Graca Machel.

In an interview with Mark Austin, Winnie Mandela said that the pair refer to each other as "big sister" and "little sister" and even confided that they moan together about the former president of South Africa.

Read: Exclusive: Ex-wife Winnie talks of 'sadness' over Mandela health

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Mandela 'responds to treatment'

Former South African President Nelson Mandela is "responding to treatment", according to an official statement tonight, but is still in a critical condition in hospital.