Hi, I've been through the full battery of tests, plus ivf. It was a couple of years ago but I'll try to put down everything I remember.
Pre clinic referral, I had smear and std tests, blood tests for standard stuff (thyroid etc), bloods for a cycle day 21 progesterone. Scan wise, I had ultrasounds and an HSG, which is where they squirt dye into your tubes to check if they're open. This was all arranged through GP.
DH had bloods (testosterone i think) and semen analysis. His showed poor morphology score but otherwise ok.
Then we attended fertility clinic appointment, further bloods to check ovarian reserve (i think) and a further semen analysis, by which point DH morphology had slightly improved. They had mentioned possibility of a hysteroscopy but this never happened in our case. I may have had another ultrasound, I can't totally remember. Diagnosis was unexplained infertility in our case and we had IVF in the end.
I think the whole process from initial gp appointment to treatment starting was maybe 3 or 4 months - it wasn't too drawn out.
Apologies if I've missed anything out, it's been some time now but hope this helps. It was all nhs, and our experience was really positive.