Which London train services are urging passengers not to travel in heatwave? See the full list

As temperatures soar during the heatwave, several London train services are urging passengers to avoid travel if possible on Wednesday or Thursday. National Rail has specifically advised only essential trips, citing potential delays and disruptions due to the extreme heat. This advisory is crucial as it aims to prevent overcrowding and potential safety issues on the trains, especially with the risk of overheating in the carriages. It's a proactive measure to ensure the comfort and safety of passengers during this unusually hot period.