Children and adults face shocking waits of more than 2 years for an autism assessment and over 3 years for a diagnosis in some areas of England, according to new evidence. The research was conducted by Liberal Democrat former Health Minister Norman Lamb MP, in consultation with the National Autistic Society and the All Party Parliamentary Group on Autism.

National guidelines state that people suspected of being autistic should start their diagnostic assessment within three months of being referred to the autism team. 

But new statistics obtained through freedom of information requests to Clinical Commissioning Groups in England highlight a postcode lottery in waiting times for a first appointment, with many parts of the country falling woefully short of the three-month target in 2016-17.