Yes, IdlF x Uniqlo went online about an hour ago Xiao. I had been looking at the pea coat in the children's collection but it's mostly polyester, so that's out.
Peony, dare I say get both? Sounds like the houndstooth would go well with the HB coat and the plaid with the other two. Otherwise, without seeing the houndstooth, I'd say get the plaid since you seem much more enamoured with that and you're mostly buying sensibly on account of the mini bump for the next few months so live a little through scarves 
Rosie, I'm not one for Instagram much but I did stumble across an account the other day looking for some 70s inspiration. Loved the navy, rust/brown, white combo attached. Were some other great pics on there too, mostly from old fashion magazines. The account is laurakitty. Probably not what you were asking for but felt it was worth a mention.
Hairy, considering your lineup of preferred brands, if you've got the funds, have you had a look at The Row? That would have a similar feel but a bit more oomph in the fabric and understated luxe department.
Exciting about the skirt Flo, for whatever reason I can sort of imagine them going well with laced boots that go up to knee.
Quirky, I've been contemplating the weather too, it feels cool but it isn't really, except at night. Weather predictions seem to suggest warmer weather again. I have to be in the south near the Belgian border next week and it'll be 27-30
. I also saw some news reports suggesting it will continue to be unseasonably warm well into November...
I'd say that's less fit and more the foundations though. When I was in weird weight loss mode I'd lose a lot in one go, so I lost a lot of muscle tone in the process. Being thinner but flabby was a lot harder to get fit right with.