Tommy's clinic referal

Hi all looking for some help. After my 4th MC my early pregnancy midwife suggested we try and get referred to a Tommy's clinic. I contacted Tommy's who said this is through your GP. Went to the GP yesterday (a locum, we haven't had a permenant GP at our surgery for nearly 3 years!) he said he can't do the referral as the system Tommy's said to use "Choose and book" doesn't exist in Scotland. I am not sure he's right at the Tommy's midwife knew I was in Scotland. So now not sure where to go from here. My GP didn't even know what/who Tommy's were! Sent me away to find out how to get the referral myself!! Feel like once again we are being dismissed and sideline. We are nearly two years into this process and no further forward. So any help would be much appreciated. Hoping to be referred to the Birmingham clinic. Back story, was referred to recurrent miscarriage clinic here in Scotland, however they say they have completed their tests and have nothing else to offer. Hence looking for the next option. There are lots of other tests tye Tommy's clinic can offer and treatments in some cases so feel like it's worth a shot. Also my GP can't find details of the blood tests that were done by then RMC, really frustrating as I wanted to take them with me to the Tommy's clinic. At this point I feel like we are getting substandard treatment! Anyhow, sorry for rant I am just so frustrated. Does anyone have any advice on how to get a referral?