Brave Castlederg boy Billy Caldwell who has severe epilepsy has enjoyed more than 250 days without a seizure after using a "miraculous" medical marijuana product that his family claim saved his life.

Billy began taking cannabis oil for his seizures after seeing a childhood epilepsy expert in California, where medical marijuana is legal, last year.

When the 11-year-old returned home, he became the first person to receive an NHS prescription for medical marijuana in the UK.

Now the medicine, which contains a compound found in cannabis plants known as CBD, has been named Billy's Bud after the youngster.

Charlotte Caldwell, Billy's mother, said his family was "crying happy tears" over his "incredible" progress.

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