CRIMINAL charges may still be brought over the death of a Pontypool teenager who fell 100ft to her death from a rollercoaster.

The Crown Prosecution Service decided not to prosecute after a 21-month investigation into Hayley Williams' death.

But a spokesman for the Health and Safety Executive said its investigation was still ongoing and that it could still lead to criminal charges.

The HSE is unlikely to make any decision before the full inquest, for which no date has yet been set.

Hayley's grief-stricken parents, Alan and Beverley Williams, said they were "angry" after the CPS decision.

Hayley was 16 when she fell from the Hydro ride at Oakwood theme park in West Wales, on April 15, 2004, while on an Easter break with her family.

Swansea schoolboy Matthew Rothwell, aged ten, was hit on the head and injured by Hayley as she fell.

At the time the single boat on Hydro was fitted with seat belts and lap bars for the 24 riders. Now over-the-shoulder restraints for each rider have been fitted at a cost of £137,000.

Yesterday Mr and Mrs Williams issued a statement through solicitor Glyn Mattocks.

It said: "Until now the family have trusted in the justice system to deal fairly with this tragedy on their behalf.

"The decision of the CPS however, once again exposes the inadequacy in the law. The family are completely disillusioned with the criminal justice system and naturally angry.

"Our beautiful and talented Hayley, along with her sister Hannah and friends, were looking forward to a day of fun when they entered Oakwood Park.

"Tragically, our daughter Hayley never returned.

"Hayley did absolutely nothing wrong but the organisation Oakwood Leisure in which we placed our children's safety, failed to deliver Hayley back to us.

"The family await the inquest and the outcome of the HSE investigation although they know nothing will bring back their beloved daughter Hayley."

Oakwood spokesman Eryl Jones said the firm would not be making any comment until after the inquest.