Bus drivers in the West Midlands have spoken out about the “horrendous” working conditions they have experienced during heatwaves, which led to 40C temperatures in their cabs.

The UK was hit by high temperatures and dry weather in three successive heatwaves, with temperatures topping 37C last month when the country recorded its hottest ever June day. Last week, the Met Office warned climate extremes were becoming the “new ‘normal’ for the UK”.