A sex beast who subjected two young girls to a campaign of rape and other sexual abuse has been jailed for 18 years.

A judge said Joginder Mahay was “persistent, determined and exploitative” of the vulnerable victims. He corrupted one of them by plying her with alcohol.

Under an extended sentence, the 51-year-old former postman will have to serve two thirds – 12 years – of the sentence before he can be considered for release. He will be on licence for a further five years.

Judge Julian Smith said when passing sentence there was no remorse as Mahay had continued to maintain he was innocent.

Mahay, of St Johns Hill, Sevenoaks, was convicted of six offences of rape, five of indecent assault and two of sexual activity with a child.

He was acquitted of three charges of indecent assault and one of sexual activity with a child.

One of the victims told in a harrowing statement how the abuse committed in Gravesend and dating back several years, had caused her mental health problems, leading to hospital treatment.

The other victim stated: “I believe he will continue abusing and manipulating others unless he is stopped. He is a danger to young women. I want justice for what he has put me through.”

Mahay claimed the victims, now both adults, made up the allegations and he accused another man of abusing them.

Judge Smith said Mahay, who came to the UK from India when he was 32, was convicted on “overwhelming and compelling” accounts from the two women.

One of them had originally made a complaint in 2006, but it was withdrawn.

“It seems to me she was failed on a number of levels by a number of people when that complaint was made,” said the judge.

“Had action been taken at that stage it may have been some of this harm could have been mitigated.

“It brought her abuse to an end but you escaped justice at that point. You continued to act with the other girl.

“Victim impact statements make clear the profound effect of the abuse has had on them. One became addicted to drink and drugs. The other also has fragile health.”

Mahay, he said, had an impressive and high achieving career in the Punjab and had sought to make his way in the UK to a commendable degree.

But he added: “I find you are a danger within the meaning of the Act. Your continued denial and lack of insight support my judgement.”

Mahay’s name will appear on the sex offenders’ register for life. A sexual harm prevention order was made and he will be barred from working with children and vulnerable adults.

An NSPCC spokesman said: “Mahay systematically preyed on his young victims over a number of years and it is right that he now faces such a lengthy sentence.

“The mental and emotional damage Mahay caused his victims will have hugely damaging effects, and they have shown tremendous bravery in speaking out and enduring the trial in court.

“To educate children about abuse before it starts, NSPCC volunteers deliver hundreds of special assemblies and workshops to children across Kent so they can spot the signs of abuse and know who to go to for help.”