Flights were suspended at Britain's Luton airport on Monday due to a runway defect discovered following high temperatures across the country.
"Following today's high temperatures, a surface defect was identified on the runway. Engineers were called immediately to site and repair works are currently in progress to resume operations as soon as possible," the airport said in a statement on Twitter.
The airport is used by airlines including EasyJet, Wizz Air, Ryanair and TUI.

France working with allies on plan should US move on Greenland
South Korea's Lee says he asked Xi to play a mediating role on North Korea
Western Europe braces for another wave of snow and ice
Intense heatwave grips Australia's southern states, fans bushfires
