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Epilepsy patient Billy Caldwell is fighting for his life following a series of extreme seizures while his cannabis medication sits on a desk in the Home Office in London.

Paramedics rushed the youngster to Chelsea and Westminster Hospital after rescue medications failed to bring him out of a massive intractable epileptic seizure.

Rescue medications failed to bring him out of a seizure any one of which could prove fatal.

Billy is at the centre of a campaign to have a UK ban on medicinal cannabis lifted with medics and families of children with severe epilepsy saying it can be the only way to stop seizures.

(Image: Phil Harris/Daily Mirror) (Image: Phil Harris/Daily Mirror)

The youngsters from Northern Ireland used to have up to 100 seizures a night but had none for 19 months after starting to use cannabis oil.

After his GP was ordered to stop prescribing it his mum Charlotte took Billy to the world’s second biggest children’s hospital in Canada where he was prescribed a year’s supply.

However this was confiscated by UK Border Force at Heathrow Airport on their return on Monday.

Charlotte told the Mirror: “My son is dying. They are letting him die. The only thing that can save him, his anti-epileptic medication, is sitting on a desk in the Home Office out of our reach.”

Billy had been admitted to St Mary’s Hospital, Paddington for seven hours from Thursday night into the early hours of Friday morning.

This afternoon he drifted from a deep sleep into a series of increasingly deeper and potentially deadly seizures.

(Image: PA)

Then shortly after lunchtime he was hit with a massive fit leaving rescue medication useless.

The medicinal cannabis oil he had been taking to prevent seizures was in an office three miles away.

Charlotte had a meeting this week with Policing Minister Nick Hurd about Billy’s case but he refused to return the meds.

Charlotte, 50, said: “This is beyond cruelty. We’ve now reached the point where Billy is too ill to travel to get his medication, but his medication is stored minutes away from where we’re now living in London.

“Despite the best and honest efforts of the NHS, frontline doctors are fighting Billy’s condition with both hands tied behind their back because the only medication that will be effective is the cannabis oil with CBD and THC. Those meds need to be released immediately.

(Image: PA)

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“If Billy dies, which is looking increasingly possible then the Home Office and Nick Hurd will be held completely accountable.”

The medicine prescribed for Billy is legally made by Canadian manufacturer Tilray and used by many families worldwide.

It has a high ratio of cannabidiol (CBD), the non-psychoactive chemical found in the cannabis plant, to tetrahydrocannabinol (THC), the chemical that gives users a high and is illegal in Britain.

It is legal for medicinal in Australia, Canada and much of the US and Europe.