A serial sex offender was handed an indeterminate sentence today for two attacks, one committed while on bail..

Duwayne McCallum, 38, of Javelin Court, William Drive, Stanmore, was found guilty in September for attempted rape robbery and actual bodily harm but found himself back in court facing charges of sexual assault on a 12-year-old.

Despite pleading guilty to the second charge McCallum today tried to reverse this plea but this was refused by the judge at Harrow Crown Court.

He must serve a minimum of four years and three months for the attacks.

The first saw him carry a young woman sleeping on a night bus to his flat and assault her on October 18 last year.

The second attack on a 12-year-old occured in March while he was on bail.