The cost of putting stickers on hundreds of out-of-date Clean Air Zone (CAZ) signs will not be covered by the £3m contract paid for by Greater Manchester.
Transport bosses have confirmed that the £3m contract for signage awarded to McCann in September will not cover the cost of the 1,194 stickers needed.
It comes after the Clean Air Zone which was due to come into effect in May was paused as the deadline to meet air quality standards moves to 2026.