BP cleaner unleaded petrol was launched in London on Monday and will be available at all of the company's 164 service stations within the M25.

Introduced first in Edinburgh in February, the fuel replaces regular unleaded 95 octane petrol and claims it cuts hydrocarbon emissions by 25% as well as emitting less carbon monoxide and nitrogen oxide. The Government's 1p a litre tax break on ultra-low sulphur petrol comes into effect on October 1.