Next weekend, 15-18 March, will see the first closedown of a stretch of the M25 for engineering work. The shutdown of this critical piece of national infrastructure will cause problems for many travellers. What is the recommended diversion? (Don't even think about trying it.) How should you travel between Gatwick and Heathrow airport? On Thameslink and the Elizabeth Line, via Farringdon station in central London.This podcast is free, as is my weekly newsletter. Sign up here to get it delivered every Friday. Hosted on Acast. See acast.com/privacy for more information.