Every area is different but don’t be surprised if it’s after 10 weeks. I’m in Staffordshire and the booking appointments for both pregnancies were after 10 weeks. It depends on the area and how busy they are. If you haven’t heard anything by 9+3 ish call the maternity hospital or midwife hub to chase it up. I wouldn’t worry much before then though.
I phoned the midwife last Thursday and they rang me today and booked me in for Sunday and I’m 6 weeks today xx
Same experience for me, anxiously waiting for them to give me a ring back, I called them on Wednesday!
Usually between 8-10 weeks first appointment and will work round your schedule x