Heathrow asks airlines to carry excess fuel despite carbon impact

Airport cites supply issues, but says there has been no impact on passengers or flights

Airlines flying to Heathrow have been told to carry as much fuel as possible in their tanks because of supply problems at Britain's largest airport, in a controversial practice that can increase carbon emissions.

The airport asked airlines to carry excess fuel on the way to London and to avoid carrying too much when departing, citing supply issues, in a notice sent on Sunday. The notice covered nine days from Sunday 23 July to Monday 31 July.