I think you're giving the BMS way too much power in all this. It's just a charity bringing together doctors who specialise in the menopause and offering education and training - and membership.
It's not a requirement to belong to the BMS - and neither, in my eyes, is it a marker of a 'good' menopause doctor necessarily, at all. Just as, in the US, there are 'NAMS' (North American Menopause Society) doctors still prescribing oral estrogen and 'shortest dose for shortest time' stuff. Just because an organisation exists and proclaims itself THE definitive organisation for something, doesn't make it into that.
I don't have much time for the BMS because I've seen a BMS certified menopause doctor before the Newson Clinic who had all kinds of crap information, told me I couldn't have local estrogen AND systemic HRT. Told me I couldn't have 2 types of local estrogen (Vagifem internally and Ovestin externally) and she'd 'never heard' of that before. Expressed surprise that I'd just come off the pill and could feel twinges and sharp pains from my ovaries as a result ('but how do you feel your ovaries?') and so on.
So no.... Doctors have to prove themselves in conversation with me, that they know about the menopause. That they know more about it than me (which frankly is quite a lot, by this point) and that they will work with me and not just exercise power and tell me what to do. I don't really give even a tiny little sh*t about whether they are a member of the BMS, which is an organisation which until a few years ago thought the WHI was THE BOMB and has had to be dragged screaming out of conservative-land and into modern menopause care - embarrassingly by people like Louise Newson and Davina. They then looked incredibly behind with things and now are on a vendetta as a result. It's like we're still in the school playground.
Every time I see someone write 'but LN has lost her BMS accreditation' as if it therefore proves she's some kind of quack, I'm like... what...? What did you really think the BMS is?? She hasn't lost her licence to practise medicine.
So no, she hasn't been 'discredited' officially at all. And, even if - in the eyes of my GP - she has, that (as you say) happened last year. But doctors are easily influenced (sadly) and making a song and a dance about it via Panorama can easily lead to them suddenly deciding this is a very bad thing, having not cared about it before.