By Amber Murray Sir Richard Branson and his company, Virgin Group, are household names in the UK.He’s long held the title of Britain’s most famous entrepreneur and owns more than 400 businesses in everything from space to banking to cruise ships. His net worth exceeded £4bn in 2022, making him one of the richest people in the country according to the Sunday Times Rich List. However, his net worth has now plunged to £2.4bn, which, while flat year-on-year, is still down meaningfully from the £4bn-plus reported for 2022 and the near-£5bn reported for 2017 So, what happened to Richard Branson’s ne…