McDonald’s is to run its fleet of lorries on chip fat.

The fast food giant has pledged to recycle the cooking oil used in its restaurants to make environmentally-friendly biodiesel.

And it aims to use the fuel in all its 155 vehicles in the UK by next year.

McDonald’s said the move will save more than 1,650 tonnes of carbon every year – the equivalent of taking 2,424 family cars off the roads a year.

The cooking oil from its restaurants will be combined with rapeseed oil.

A trial by the group – underway for almost a year – has converted 150,000 litres to biodiesel and McDonald’s delivery vehicles have already been running on 95 per cent diesel and 5 per cent biodiesel.