Is Iran the world’s biggest threat?

Iran is a key player in the Middle East – the country supports extremist Islamic groups across the region, notably the Houthis in Yemen, and Hezbollah in Lebanon. Following UK airstrikes on Houthi rebels in Yemen last week, defence secretary Grant Shapps on Monday gave a major speech on his vision for UK defence, when he said the government would "consider" further action against the group in the Red Sea if needed. On this edition of the Sky News Daily, lead politics presenter Sophy Ridge looks into Iran's position as allies of the group - and the country's play for power in the Middle East. Sophy is joined by Rob Macaire, former Ambassador to the Islamic Republic of Iran from April 2018 to July 2021. Plus, more analysis from defence and security analyst Professor Michael Clarke. Producer: Soila Apparicio Editor: Philly Beaumont