I actually slept OK, so I got up and did my workout this morning (recovery week means I'm not bothered about catching up the ones I missed.
This was the first go on the Bushido with the fixie running 48x24 - it was great.
https://www.trainerroad.com/career/duncanm23/rides/49447858-darwin-43x10 minutes between 95 and 99% of FTP, with about half of each interval being done in the aero bars. I've been practising getting into turtle position, but I can't hold it for very long (and that's without a helmet). Definitely more work needed on that front. The positive is that the new "Fast Forward" seatpost is great - it moved me a good few cm forwards and it means that the aero position is really comfy. I just need to play around with low/mid/high hands when I can ride outside and do experiments.
Ramp test on Sunday should give me a nice boost - these intervals were doable in aero, and fairly comfortable out of it, so I'm hoping I'll get a bit of a bump in FTP and that will make things a bit of a stretch again. It's a nice feeling going into workouts knowing that you should be able to complete them and work on other things, but at the same time, it's probably not going to make me faster...