MANSLAUGHTER charges could be brought after a Pontypool teenager plunged 100ft to her death from a rollercoaster at a West Wales theme park.

Hayley Williams, 16, of Broadway, fell from the white-knuckle Hydro ride at Oakwood Park in Pembrokeshire last month.

The teenager, who was a Sunday-school teacher, was airlifted to Withybush Hospital, Haverford West, but died hours later from internal injuries.

Chief Constable of Dyfed-Powys Terry Grange is due to speak to police authority members at a special meeting on Monday.

He is expected to tell them that a multi-agency investigation involving the Health and Safety Executive is ongoing.

An extract from the report to members says: "Liaison has taken place with the Crown Prosecution Service in Birmingham (corporate specialists) and a full examination and process has been requested with consideration for manslaughter and health and safety offences."

So far, police have interviewed 96 witnesses in relation to the incident, the report says.

Hayley was on the £1.7 million ride with a group of friends at the time of the incident on April 15.

The ride is billed by Oakwood as "Europe's fastest and wettest water coaster".

A 10-year-old boy also suffered minor injuries, caused when Hayley fell, and was taken by ambulance to hospital.

He was discharged later the same day.

Bosses at Oakwood, billed as one of the top 10 theme parks in the UK, defended the attraction's safety record in the aftermath.

They said that the rides are tested every day.

When asked about the possibility of manslaughter charges, a spokeswoman for the theme park said: "We are not aware of any development."

The teenager was a pupil at St Alban's RC High School. She had been with her mother, Beverley, and younger sister, Hannah, 13, on holiday at the family's caravan in Pembrokeshire when the tragedy happened.

Father Alan was away working.