A couple who've waited more than three years for an inquest into the death of their five month old baby have been told they will now have to wait even longer.

At a pre-inquest review at Preston Coroner's Court into the death of Jackson Pickup, Coroner Dr James Adeley told Jackson's tearful parents, Caroline and Steven Pickup, that they may face a further two month wait before proceedings could move forward.

Five-month old Jackson was born on July 19 2016, and died at Royal Blackburn Hospital on December 17 after being admitted two days earlier.

Dr Adeley the pre-inquest review that the little boy, who was born with a rare heart defect called hypoplastic left heart syndrome, in which the left side of the heart doesn't grow as it should, had undergone the first stage of open heart surgery not long after his birth.

He said: "Following this, he sustained an infection which caused him to have a critical illness neuropathy but he was said to have recovered from this, and was put on oxygen."

However, on December 15, he was taken into intensive care at Royal Blackburn Hospital and put under the supervision of staff in the High Dependency Unit.

Dr Adeley explained how systematic failings with an oxygen cylinder and ventilation machines, under-qualified nurses and incorrect check-list completions led to Jackson's oxygen levels depleting and he suffered a cardiac arrest.

He said: "A statement from the anaesthetist says that a trainee was allowed to undertake intubation of a child who had had a cardiac arrest, has been brought back, and is known to have a cardiac condition.

"The anaesthetist said that this was 'not the best procedure'.

"This is said in the report and is what I consider the understatement of the year."

Dr Adeley told those present in court, which included solicitors and consultants, that all paper work and witness statements must be completed and compiled within six weeks, so as not to cause the family any more upset.

He said: "It's three years after the death of Jackson and now you want six weeks more.

"It's six weeks for everything I am about to ask for and if you do not produce the documents you will be in court under summons until they are produced."

The court heard how lessons had been learned from the events leading up to Jackson's death, with extensive recommendations made for improvements in terms of nursing and medical staff training, more details of which would be disclosed at the full inquest hearing.

A date for the full inquest is yet to be set.