4:30:21 in the KCA for me. I set off at a conservative pace as I had no idea what I could sustain, having done zero speed training since I got back 10 days ago. This ride was purely to get a qualifying time for the nationals in a month - I wouldn't be racing in this sort of condition otherwise - so I was also using it as a test bed for several new bits and pieces and had got the bike out of a friend's loft a few days before and on the road the previous day, running a double ring in a single setup, no chain guard, and a pair of brake calipers I'd bought on the way down when my hydraulics turned out to not be working. Oh, and I hadn't paired the PM and the Wahoo was still in kilometres.
Result: 4:30:21 including over four minutes stopped, mostly retrieving my dropped chain (eight times) or fetching water, as I'd decided my BTA bottle holder was sufficiently dodgy that I just ran with the saddle bottle. This was always going to be a lastminute attempt so I don't begrudge that; I did what I had to and now I'm pretty sure I'll get into the nats.
Lessons:
Get a gorilla cage for the front, and cut a mount between the tribars so it can be attached at both ends.
Find a Rotor spider tool somewhere so I can install my single chainring (I suspect I have one in the loft but don't want to disturb the tenants again so will have to buy another one).
Ride more in the TT saddle, and never forget to use chamois cream on a long time trial!