Teenager Tom Ousby had been hit around the head before he plunged to his death from the ninth floor of a Magaluf hotel, a post-mortem has revealed.

The 19-year-old, who had been working as a DJ in the Spanish holiday resort, also had bruises across his back and a black eye, according to a report in yesterday’s Daily Star Sunday.

In an interview, Tom’s mother, Lea, has now claimed the way her son fell indicates he was unconscious before he hit the ground. But Spanish police have closed the case and Tom’s family are begging British authorities to open a murder investigation.

The family, which was living in Star Road, Hillingdon at the time of Tom’s death, do not believe he jumped but that he was pushed or thrown. Mrs Ousby has vowed not to rest until the family gets justice.

Tom, a former pupil of Bishopshalt School in Royal Lane, Hillingdon, was working in the popular Mallorcan party resort at the time.

He died on the morning of August 1 at the Parc Atlantic Hotel, although it is not known why he was at the hotel because he was not staying there. He had no drugs and a very small amount of alcohol in his system at the time of his death and had been in his own apartment about an hour before.

Witnesses report seeing Tom being chased by two men in the hotel grounds just before the fall, but the hotel says they no longer have CCTV images. The Met Police has reportedly told the family it is powerless to act and the investigation is a matter for the Spanish authorities.

Prime Minister David Cameron apparently told the family to appoint a Spanish lawyer, which it has.

Since Tom’s death, thousands of pounds have been  raised in his memory., and a group of his friends will run the Hillingdon Half Marathon on March 23 to raise cash for the Nystagmus Network, a charity which carries out research into the eye condition which Tom had.

The mother of one of Tom’s friends is supporting the charity through the pilates classes she teaches, and some of the £15,000 raised in the days after his death has also gone to the charity.