United Kingdom, Severe Weather, Level 3: Severe weather warning across the nation – United Kingdom [Update 5]

Update 2023-09-21: Heavy rain and flooding overnight Thursday (20/21 September) disrupted regular public transport operations. London Kings Cross / Moorgate and Stevenage, Hertfordshire were closed. Further trains could be cancelled or delayed.
Further disruptions were reported from Tulse Hill, Cheltenham Spa and between Lewes and Wivelsfield and West Ealing and Greenford.