The London Underground line that is nearly 40C during the heatwave

• Temperatures on the London Underground reached almost 40C on Wednesday, making it the hottest June day on record.
• Readings taken on the Central line, one of the capital's busiest, showed highs of 39.4C.
• Despite the extreme heat, commuters continued to use the Tube, with some noting air conditioning in their offices.
• Air-conditioned lines, such as the Metropolitan and Elizabeth lines, recorded temperatures around 22C, but only 40 per cent of trains currently have air conditioning.
• The full list of readings were – Elizabeth line: 22.6C, Metropolitan, Circle and District line: 22.7C, Victoria line: 33.6C, Piccadilly line: 33.7C, Jubilee line: 37.2C and Central line: 39.4C.

IN FULL

London’s hottest Tube lines revealed as capital bakes in record-breaking heatwave