Britain's Carillion CEO quits as company issues warning

July 10 (Reuters) - Carillion CEO Richard Howson has stepped down, the British construction and support services firm said on Monday, as it issued a full-year profit warning citing difficult markets and deterioration in some contracts.

The firm, which helps maintain British railways and roads, said it had launched a review of its business and capital structure and plans to exit Qatar, Saudi Arabia and Egypt.

Carillion, appointed independent non-executive director Keith Cochrane as interim CEO and Howson will stay with the company for up to a year to help with the transition.

It said it now expects revenue of 4.8 billion to 5 billion pounds for 2017, down from 5.2 billion in 2016. (Reporting by Esha Vaish in Bengaluru; editing by Jason Neely)