Len McCluskeyBus workers in London will stage further strikes unless there is a deal over their claim for a bonus for working during the Olympic Games, a union leader has warned.

Thousands of drivers and other employees at 17 bus companies staged a 24-hour walkout on Friday in pursuit of a claim for a £500 bonus, causing travel chaos across the capital.

Three bus companies were exempt from the action after they obtained a High Court injunction just hours before the strike was due to start.

Len McCluskey, general secretary of Unite, warned the employers that unless they negotiate a "fair and sensible" solution, there will be further strikes.

He told Unite's national policy conference in Brighton: "This is a straightforward dispute about fairness, giving hard-working bus workers the same bonus for facing challenges, that have already been awarded to other transport workers, and a fraction of the bonuses being paid to Transport for London bosses.

"I say to Mayor Boris Johnson and the rest of the bus companies 'Sort it out or more strikes are inevitable'."

Mr McCluskey said the court injunction had been granted on "spurious" grounds.

Unite is waiting to see the reasons for the injunction being granted before announcing its next move.