Slight variation to this, trying to make a booking at the moment and it's giving me the seat map mid-booking on the website. But it also doesn't recognise BAEC status (I'm logged in) at this point I guess because they've switched the passenger selection page to after the seat map. Which is absolutely a pointless complication when it worked fine before.

See the 'add your FF status at the next step' note below. So I had to go forward, add myself, and come back to pick seats, which is so unnecessary.

EDIT: Even better, the part pay with Avios option has completely disappeared. It's normally where it tries to upsell you into a hotel package in the booking, but not there at all. Great...