Sarah - if you are taking 200 mg progestogen for 10 days in 8 weeks then it is an 8 week cycle. Regarding how much you are prescribed, as you are under a private gynae so yes you can be closely monitored. It is still less in 8 weeks (2000 mg) than the licensed amount for 4 weeks (2400mg), I agree this might be excessive for some doses but it needs to be done under medical supervision as you do.
Also I have to re-iterate that John Studd recommends 7 days of 100 mg progestogen (Utrogestan) in his discussion about progesterone intolerance. I repeat that anyone who is seeing him will have the benefit of regular private scans for which they will pay, to check the womb lining. I would not suggest any woman just decides to do this without medical supervision and if she cannot afford regular (annual) scans. Also since the amount of progesterone to oppose the oestrogen building up the womb lining, is dose dependent - this 7 day x 100 mg dose can't possibly apply to all doses of oestrogen! Nor does he distinguish (well on the section of his website I was looking at!) between oral and vaginal use which will make a considerable difference to absorption and action on the womb lining.
Having said all of this Diamonds and pearls, you are on a low dose of oestrogen compared to most women on HRT, and therefore will need less progesterone - other things being equal, so it may be sufficient.
I think you will find Dr Currie will recommend continuous combined HRT, but perhaps if you consult her, give her your reasons for wanting to be on a cycle and see what she says. Hope it is all successful!
Hurdity x