Foreign Death Pension

My mother was a British National residing in India for the last 24 years as a NOR (Not Ordinarily Resident) and an O.C.I. holder. She had a pension plan in U.K. but she passed away last year before the pension retirement age . So my father received the Bereavement (Death) Claim Money from U.K. directly in his Indian Bank A/c on behalf of her . I want to know if it's taxable . If yes , is there a certain percentage that my father needs to pay ?