I bet a lot of people will find this thread while searching so I'll put up what order I've had things in Worcester
GP appointment for referral to midwifery, I booked it about 7 weeks. He gave me my book and asked me to fill in the obvious stuff to save the midwife doing it. We had a little chat about birth plans and viatmins buy I think it was as his wife had recently given birth in a neighbouring trust (we are on a border).
12 week scan letter arrived in post next. I hadn't had anything about booking so spent some time chasing but got nowhere fast.
Eventually letter arrived for booking appt at 10 ish weeks. Midwife came to me, did blood pressure and urine but obviously no bloods. Booked me for 16 week appointment with her at doctors surgery.
Urine test showed UTI which the GP contacted me about and dealt with.
Bloods done at hospital take a ticket and wait session.
12 week scan was immediately followed by brief midwife appointment at the hospital (discussed booking blood results and would have done another urine but I was still on antibiotics).
Sent me downstairs with apperwork for take a ticket bloods for screening tests.
Screening results arrive in post. 20 week scan appointment letter also direct from hospital.
16 week appointment with midwife just chat about screening, bp, urine and fetal heartbeat.
20 week scan just the scan no chit chat or bloods etc.
Next up is 25 week with midwife at doctors which was booked in during 16 week.
This will vary in different area but I think wherever you are it all becomes easier to follow once you're 'in the system' it's just getting started that seems a headache.