Lawyer and friend of missing Princess Latifa of Dubai says former president Mary Robinson has vowed to "help in the campaign to free her" and has a "critical and key" role to play.

The captive daughter of Dubai's ruler, who is being held hostage by her father, was previously described by Mrs Robinson as a "troubled young woman".

The former United Nations High Commissioner for Human Rights was forced to apologise after a photograph of her and the princess went viral in 2018 and re-emerged last month as part of a BBC Panorama broadcast.