India, Dec. 23 -- A British man is facing a raft of serious sexual offence charges after investigators alleged he subjected his former wife to years of sexual abuse, in a case spanning more than a decade.

Prosecutors said on Monday that the 49-year-old has been charged with 56 offences, including allegations that he repeatedly drugged and raped the woman, who is now his ex-wife. Five other men have also been charged with sexual offences against the same woman, officials said.

Investigators allege that the accused Philip Young repeatedly administered substances to overpower Joanne Young, in order to carry out sexual assaults over 13 years.

The victim is being identified after she chose to waive her automatic legal right to anonymity and...