"It is an amazing story, but because of the legal issues involved we are unable to discuss it at this stage," Conibear was quoted as saying. However, she has declined to say whether any members of the family accompanied her parents to Zurich as under Swiss law anyone who assists a suicide faces questioning to ensure no crime has been committed.

In the UK, assisting a suicide remains a crime punishable by up to 14 years in jail. In fact, the couple's suicide came after Britain's Chief Justice had signalled that anyone "helping" a terminally ill person to organise an assisted suicide abroad would not be prosecuted in the country.

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Medical authorities in Switzerland are yet to issue death certificates for the couple and the family have not yet notified the authorities of their deaths, according to the Bath coroner.