When seeking a diagnosis is it essential to have input from someone who knew me in childhood?

Thanks to everyone who responded to my previous question. I got looks of helpful answers.

My next question is about having an assessment. 

I have read that assessments ask for information from someone who knew me when I was a child. My problem is that I can't think of anyone who I could ask to do this. There are reasons why I don't not think either of my parents would be suitable options.

Is it a necessary part of an assessment for diagnosis to have information from someone who knew me in childhood? Is it even worth bothering asking my GP about seeking diagnosis if I know that when they ask me about this I already know there is no one to ask?

Parents
  • I went down the NHS route, I had a questionnaire from the autism unit and a request for consent for them to contact a relative who knew me as a young child. I returned the questionnaire and explained that I’m older, don’t have anyone and my memory from my childhood is very good. The reply was fine and the consultation could be carried out without any outside input.

Reply
  • I went down the NHS route, I had a questionnaire from the autism unit and a request for consent for them to contact a relative who knew me as a young child. I returned the questionnaire and explained that I’m older, don’t have anyone and my memory from my childhood is very good. The reply was fine and the consultation could be carried out without any outside input.

Children
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