Thank you for both sharing your experience and the links

and congratulations (not sure if that is the right word) on getting your diagnosis. I am actually close to central London. I haven't been able to get much info on services in this area other than that there is now a specialist adult autism assessment team that from what I have been told, referrals are made by the GP to them, and after performing an interim assessment then they refer on to the appropriate professionals to make a diagnosis. Not sure whether this system works better or worse than what they have in place elsewhere.
1st how did u get on at your GP's
2nd if u failed again, go to adult social services ask them to write a letter to your GP in regards of the autism 2009 act and 2014 care act, take that with leaflets to your gp and request the AQ50 question sheet, they are legally required by law to do this, once that has been don't it then goes to a review board and if the score reflects your autistic you will then get funding approved to go for testing.
I'm in the UK West Midlands and for 2 years with a mental heath professional had no diagnosis then moved to another area close by and seen another mental heath professional that told me thire was nothing wrong with me and to stop taking the antidepressants, a month later I was in a bad way and was at the GP's again and he looked up this prats report and he had actually diagnosed me with multi personality disorder with narsasitics tendencys witch is not correct, lucky for me I've studied law for many years and had done the above and when I had the GP's back against the wall with the law I got the test and the review board stated highly suggestive I'm autistic, the GP still won't accept it but that don't matter now as its way above his head and he is now just a paper pusher (still too dumb for that roll) for the paperwork that he has to fill out for my now funded referral and my appointment is on the 13th this month
adult socal service also by law has to do a risk assessment on you and also asighn a autistic trained socal worker to you even before the diagnosis, mine was done at the review board from the AQ50
hope you can read what I've typed as I'm not too great at typing and it helps you move beyond the really stupid GP's that I'm my limited phycoigy understanding most GP's suffer delusions of grandeur
and need to take there head from thire butt and stop thinking they are mentally superior to others as I find them nothing more brighter that a chimp being told what chemical cocktail go with what symptoms and if they don't work move on to drug B then C till the patient gives up or tops themselves, GP's are just legal drug dealers for the pharmaceutical companies that need to push as much useless experience drugs as possible to get money out the NHS limited funds.
sorry got blind sided by what rages me with the current system I see so obviously is floored for profiting drug cartels