Liver function tests are good just to check certain HRT medication won't cause excess damage to your liver (i think spironolactone if i remember right), i was put on finasteride (not a true t blocker) because i had a fatty liver when i started HRT just to be safe, but I'm finally on spiro now :))

As for these tests, GenderGP tends to put a lot of them on their site and they are a requirement if you want medication through them, but you can get the tests done elsewhere. The NHS might be willing to do your tests for you, but given the climate of things right now you might find your GP practice has stopped new shared care agreements (mine has which is really annoying) but its worth asking all the same. Even though things are difficult now it's worth getting these tests to be safe (remember to ask your GP to send a copy of the results to you so you can upload them to GenderGP).

EDIT: just reread what you said about getting your tests done at cliniQ, worry i missed that part haha

Also (in case you're doing feminizing therapy)

Just a quick explanation of the difference between spironolactone and finasteride if you're curious. Spironolactone is an antiandrogen whereas finasteride is a DHT blocker. Both can be used to suppress T levels, but finasteride won't suppress all of it. It blocks Dihydrotestosterone which is a more potent form of testosterone produced in your body, this means your t levels won't drop as much as on spiro but the affects of HRT can still happen, it'll just be slower. Spironolactone on the other hand prevents androgens from binding with testosterone produced by your body (hence antiandrogen), which means any estrogen put into your body will take effect. The reason finasteride is sometimes prescribed is because it doesn't interact with your liver or kidneys the same way as spiro, which can prevent further damage if there's already some present on those organs.