BP, Britain's largest company by market value, has ended its lengthy search for a new chairman today with the appointment of Ericsson chief executive Carl-Henric Svanberg. The search to fill one of the CityÔÇÖs most prestigious posts began almost two years ago, with current chairman Peter Sutherland expecting to have stood down late last year or earlier this year. Fifty-seven year-old Svanberg will join the BP board this September after seven years at Ericsson and is expected to take over from Sutherland on 1 January 2010.