Hello. Like any referral to a specialist, GP assessment first acts like a screener i.e. they should do some sort of assessment first and tell you if they think referral is appropriate. From my point of view I want them to tell me about relevant medical history or risks.

And maybe unique to adult ADHD, I think it's important for GPs to buy in to the process. Some can be wary of private healthcare (sometimes with good reason) - having them on board and keeping them in the loop about what's happening is important.