Sue Parr said parents were being treated as 'second class citizens'

Andrew Holton was suspended from his post as a children's neurologist five years ago.

A private General Medical Council (GMC) hearing began last month to decide whether restrictions should be placed on him in future.

But it has been delayed until September as a witness is understood to be ill.

Dr Holton misdiagnosed more than 600 children, prescribing drugs that left some unable to walk or see properly.

I think we've been treated really badly, been treated almost as second class citizens Sue Parr, patient's parent

After being suspended from the Leicester Royal Infirmary in 2001 he was allowed to retrain and currently works as a specialist at New Cross Hospital in Wolverhampton in the West Midlands.

Sue Parr, of the Leicester Epilepsy Concern Parents and Carers Group, said her 18-year-old son Peter, one of the patients affected, was "absolutely astounded by the hypocrisy and dishonesty".

She said: "It tears us all up inside, it makes us physically - and some of the children are physically sick - emotionally sick and very despondent.

"I think we've been treated really badly, been treated almost as second class citizens and I think this has shown just how little respect the GMC has for the patients involved, and the enormity of the traumatic experience that they've gone through."