Nazanin Zaghari Ratcliffe

Making her first Glastonbury Festival appearance, Ms Zaghari-Ratcliffe spoke about her imprisonment for six years in Iran.

Redress and the Free Nazanin Campaign say there has been an escalation of state-hostage taking in the past 12 months as they urged the foreign secretary to act.

Ms Zaghari-Ratcliffe, who lives in north London, said Sir Andy’s win left her feeling “ecstatic” - but it would be years before they could actually meet.