How much is the national debt and should you care?

The study will recruit 4,000 students aged 12 to 15 from ten Bradford secondary schools and seek to assess the impact of having less access to social media – particularly on areas of their wellbeing such as sleep, anxiety levels, social interactions, as well as absence and bullying in schools.

Andre Lavoie joined SpaceX in 2009 as an engineer, designing the pressure tanks that help power its rocket. He was paid partly in stock – a common trade-off at start-ups as a hiring incentive. Some 17 years on, those 200,000 shares he was given are worth about $23m (£17m) – and the 63-year-old says he’s…

Gallagher, who is from County Fermanagh, said while she welcomed the talks, she hoped that any support mechanisms would reflect the fact that rural homes in Northern Ireland in particular have fewer alternatives to oil, as a lot of areas don’t have gas networks.

Unlock the Editor’s Digest for free Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. United Arab Emirates state energy company Adnoc has emerged as the frontrunner to buy Russia’s controlling stake in Serbia’s sole oil refinery, as Belgrade grows increasingly frustrated with Moscow’s foot-dragging under US sanctions. Adnoc, or…