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In the grip of severe but undiagnosed post-natal depression following the birth of Matthew, she said her reaction had been "I can't do this again".

The court heard how she became pregnant in the summer of 1997, while she was suffering from undiagnosed post-natal depression following the birth of Matthew the previous year.

Experts have told the BBC how most people living with bipolar disorder in the UK are "undertreated, undiagnosed and left to try and survive in a system that has failed them".

He argued Prosper was living with an undiagnosed neurological development disorder in ASD, lacked any previous convictions and stressed his young age must be taken into account.

But it is estimated at least 500,000 people are undiagnosed.