There are no trains to and from Marylebone until further notice. Police are investigating after someone was hit by a train.
#Marylebone Chiltern Railways passengers may use CrossCountry, Virgin Trains & London Midland on any reasonable route
More top news
The high of 35C was recorded on a Bakerloo line train between Piccadilly Circus and Oxford Circus at 2pm.
Weather forecasters say temperatures could reach 35C, beating the previous record of 34.6C in the scorching summer of 1976.
After years of political manoeuvring over the future expansion of Heathrow Airport, there has been an important development this lunchtime.