It's changed a lot in my 3 pregnancies in 4 years! With my 1st there were regular checks right the way through, now, as with my second I just have booking appointment, 12 week scan, where I saw the consultant (I've had c-sections), now I just have 20 week scan then MW fron 24 weeks and then another in 4 weeks (I think) then every two weeks thereafter.
I was told it was deemed that the earlier appointments were of little medical advantage and gave the sense of pregnancy being a medical condition rather than something normal, so policy has been changed.
I would have gone at 16 weeks for the triple test if I'd opted for it, but I choose not to have that test with any of my babies.