Commuters are being warned to expect major disruption to their journeys tomorrow because of a bus strike.

Drivers at 14 of London's 18 bus companies are due to walk out in a dispute over pay and conditions.

The affected firms, including the biggest operators like Go-Ahead, Metroline and London United, are responsible for 97 per cent of the capital's bus routes.

The drivers' union, Unite, is demanding a single London-wide pay deal for all 24,500 drivers instead of the current system of different rates applied by different companies.

Transport for London said it expected bus services tomorrow to be 'patchy' but could not say for sure how many services would operate.

It is extremely disappointing that Unite has decided to go ahead with this unnecessary disruption, especially given the low turnout for the ballot and low numbers voting for the strike.

Leon Daniels, Transport for London

Unite released the results of a survey claiming two thirds of Londoners think bus drivers should be paid the same.

Strike action is the last resort. We've been forced into this position by the operators' refusal to even meet with us. Passengers sitting side by side on the same route expect to pay the same fare, so why shouldn't drivers expect to be paid the same rate?

Wayne King, Unite

The bus companies argue different routes need different skills and claim a London-wide pay deal would be unsustainable.

The 24-hour strike is due to begin at 4am tomorrow morning.