The sentencing of the owner of a West Wales theme park where a Sunday School teacher died has been put back until November.

Hayley Williams, aged 16, from Pontypool, was killed in 2004 when she fell from the Hydro Ride at Oakwood near Narberth.

The owner, Oakwood Leisure Limited, has already pleaded guilty to a single charge of failing to ensure the safety of visitors and had been due to be sentenced at Carmarthen Crown Court on October 2.

But the firm has put forward mitigation which is unacceptable to the prosecution and a judge has agreed to a two-day court hearing to settle the matter.

The mitigation may affect the size of the fine faced by Oakwood Leisure.

Judge John Diehl, sitting at Swansea Crown Court, listed the hearing for November before a High Court judge. A date for sentencing will be fixed following his rulings.

The Hydro ride was advertised at the time as 'Europe's fastest and wettest watercoaster.'

Hayley had been taken to Oakwood as a treat along with her sister Hannah by their parents Alan and Beverley.

Hayley was airlifted to hospital, but died of internal injuries, while 10-year-old Martin Rothwell, of Swansea, was treated for head injuries after he was hit by Hayley as she plummeted to the ground.

The theme park was packed with families over the Easter holidays when the accident happened.

The charge against Oakwood Leisure was brought under the Health and Safety Act 1974 by Pembrokeshire Health and Safety Executive.

The charge accused the park of failing to conduct its undertaking in such a way as to ensure, so far as was reasonably practicable, that persons not in its employment, including Hayley Williams and Martin Rothwell, were not exposed to risks to their health and safety.

An inquest into Hayley's death returned a narrative verdict stating that: "Hayley was ejected from the Hydro ride because she was not properly restrained and died as a result of the injuries she sustained."

The jury had been told not to consider a verdict of unlawful killing for legal reasons.

The £1.7m Hydro ride featured a nine-tonne 24-seater boat which hurtled down into a million gallons of water sending out a 45ft wave.

The ride was closed for 12 months after Hayley's death.