Access arrangements for GMAT Exam.

This is an American examination and the report must be made according to the diagnostic criteria in DSM-5, which is the guide to diagnosis used in the USA.  There is a requirement that a substantial body of evidence is referred to in the report.  It is important that you have evidence form your past, such as old school reports, assessment reports, letters etc. 

It can be very difficult to find an educational psychologist to make this type of assessment in the UK.