The family of a British couple detained in Iran have told Sky News the government should consider a prisoner exchange to secure their release. Lindsay and Craig Foreman were on a round-the-world motorcycle trip when they were arrested on suspicion of being spies in January last year and sentenced to 10 years in jail – charges they deny. Their family believe a man who was sentenced to life in the UK is a person of interest to Iran, and could hold the key to freeing the couple.