So, a new set today:
20 x 50m, target time 55s, interval 85s
recovery
16 x 25m, target time 21s, interval 60s (or as many reps as there are time for)
Actually it didn’t go too badly at all. I did get a bit messed up about halfway through the 50m reps and lost track of the clock slightly, partially due to the fact that it always takes me a little while to get used to using the pace clock with the 85s interval and partly because the lane was unusually busy today and I was blocked from leaving the wall a couple of times.
So, I’m not going to count it as a success going towards reducing my interval again, but I did at least manage all the 50m reps and twelve of the 25m reps.