Capita, the outsourcing company that operates the London congestion charge, has said its chief executive is stepping down after it reported a big fall in profits.
The firm said Andy Parker would step down later this year once a replacement had been found.
The news came as it revealed that annual pre-tax profits had fallen 33% to £74.8m.
Capita has also been under fire over the way it collects the TV licence fee.
Capita, which collects the fee on behalf of the BBC, is now under investigation by the corporation after allegations that its collectors targeted vulnerable people, spurred on by an aggressive incentive scheme.
In addition, the company will drop out of the UK's FTSE 100 index of leading shares later this month because its share price has fallen sharply.