LONDON, May 4 (Xinhua) -- London mayor electee Boris Johnson of the opposition Conservative Party pledged on Sunday to be a "mayor for all London" after attending the Sikh New Year festival Vaisakhi in Trafalgar Square.

    Johnson will accept the seals of office from Ken Livingstone at midnight after the latter was defeated in the London mayor election held on May 1.

    Johnson said at Trafalgar Square that he wanted to support events that bring people together. "I'm going to be a mayor for all London and I'm going to work to unite communities," he said.

    The Sunday Telegraph said Johnson would introduce a series of reforms as a "test bed" for a future Conservative government.

    The new mayor is expected to build bridges with the city's ethnic minority groups, after being accused during his election campaign of being a divisive figure who could not represent all of the metropolis.

    Johnson wanted to get to grips with violent crime, the scourge of so-called minor crime and disorder on public transport.

    He will use his first days as London mayor to start work on key pledges such as 440 police community support officers on the Tube and trains, weapons scanners at stations and a review of the western zone of the congestion charge, which may be scrapped, his aides said.