A serial stalker who bludgeoned a UEL student to death in 2003 has been sentenced for a “horrific” rape he carried out 16 months earlier.

Former unemployed fitter Jason Dockrill, from Stratford, was sentenced to nine years by a judge at the Old Bailey this afternoon after pleading guilty to rape and two counts of indecent assault against a woman in her 30s.

The 46-year-old, who has a personality disorder, was already serving a life sentence with a minimum 25-year jail term for the murder of Finnish student Suvi Aronen whom he sexually assaulted and killed near Wanstead Common in March 2003.

In summing up the sentencing, Judge Rebecca Poulet said: “This was a terrifying experience for this woman and it has had a very severe and long-term impact on her.

“After this serious incident you committed a most terrible murder of a young woman.

“The details of the external and internal injuries on that victim’s body are of the most appalling and depraved nature.

“In my judgment your victim in 2001 owes her life to the fact she did everything she could to keep you calm and appeased.”

The court heard how the woman has been approached by Dockrill as she made a phone call outside a club in central London during a night out with friend in 2001.

She had been forced to a secluded area near bins where she was forced to the ground, raped and repeatedly sexually assaulted by her attacker.

When she tried to deter Dockrill further by saying she was with “four coppers”, he aggressively replied: “I used to be a member of the SAS. Now I’m a stockbroker.”

When she told him she was going to scream if he did not get off her, he put his hands over her mouth and said: “I wouldn’t do that if I was you. I could do you serious damage.”

The woman was also threatened with further violence by Dockrill during her “harrowing experience” which was relayed to the court in a victim statement by her prosecutor Anita Arora.

She is said to have suffered “severe psychological effects” as a result of her experience.

Dockrill, who becomes eligible to be considered for parole in 2028, was only charged with the earlier rape last year after his DNA was matched to evidence following a cold case review.

In March 2003, Dockrill randomly assaulted three women in the Wanstead Common area, one of them aged 80 years old.

Later that same day, he attacked 23-year-old Suvi Aronen in an underpass as she walked home.

She was heard to say “stop it, you’re hurting me” before the phone went dead, the court heard.

Following the “savage” attack, her body was dragged away and hidden under a trellis and foliage nearby. She was found the next day.

The judge handed Dockrill nine years for rape and five years for each count of sexual assault, all to run concurrently with his life sentence.

She added that her remarks and details of the case should be put before the parole board for any application in the future for his release.

Additional reporting by Press Association.