As part of the new service, UCO collection points had been set up at 134 service stations in the city and the aim was to increase this to 150 points, the company said on 14 April.

“It [the new service] underlines our commitment to the circular economy and the decarbonisation of transport, an effort that we want to make our customers part of,” Valero Marín, executive managing director of Repsol’s Client business, said.

Repsol said it had been working on the project in partnership with the regional government of Madrid.

For the collection of UCO, customers could use plastic bottles of at least one litre and deposit them at any of Repsol’s 134 service stations that currently offered the service, the company said.

Committed to becoming a net zero emissions company by 2050, Repsol said it would start operations at its plant on the Iberian Peninsula this year that would produce 250,000 tonnes/year of advanced biofuels from waste, adding to the 750,000 tonnes/year that the company currently produced.

Repsol has set itself the target of producing 1.3M tonnes/year of renewable fuels by 2025 and 2M tonnes/year by 2030.