What charges are Craig and Lindsey Foreman facing in Iran and when were they detained?

Craig and Lindsey Foreman, both 52, are facing espionage charges in Iran. The British couple was initially arrested in January while on a worldwide motorbike trip, though news of their detention only emerged last week when Iranian state media reported they were being held on unspecified security charges. The couple had planned to stay in Iran for just five days as part of their global journey. Despite their brief intended stay, they now find themselves in a serious diplomatic situation, highlighting the potential dangers for British travelers in Iran.