sentences:  On September 21, Duff returned to Montlhéry with Woolf Barnato as his co-driver.Driving on a damp track in heavy mist, they covered 2,280 miles in 24 hours, averaging 95.02 mph.They beat the previous record, held by the 9-litre Renault of Garfield and Plessier, by over 7 mph.