The Ulez expansion cut the number of older, more polluting vehicles being driven in Greater London by 45 per cent but has cost drivers about £26million in levies and fines in its first month, it has been revealed.An average of 95.2 per cent of vehicles now comply with the exhaust emission rules – resulting in 77,000 fewer non-compliant petrol and diesel vehicles being driven in the capital each day, down from 170,000 to 93,000.