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Miss Butler was admitted to Norfolk and Norwich Hospital and later transferred to a specialist bariatric unit at Luton and Dunstable Hospital on the morning of 11 October.

He said it was his opinion the cause of her death was "what happened in Turkey and the lack of safety netting after major bariatric surgery".

The tertiary bariatric unit at his hospital had witnessed a "significant rise in complications" from similar procedures in the country, he told the hearing.

She had bariatric surgery in 2013 and lost 12 stone in 12 months - but during the next decade she regained four stone and started suffering painful spasms in her stomach due to side effects from previous surgeries.

Paul has type 2 diabetes, which went into remission before he underwent bariatric surgery.