Late in the afternoon I went for a swim. Today I was focussing as usual on the exit of my hand but also trying to exhale for a greater percentage of the time and look a little backwards when inhaling. I didn't worry about taking slightly longer rests between each length. Some lengths felt to go very well, others were a bit scrappy. After 38 lengths I was clearly tired as I was losing form and finding breathing harder to accomplish so it was time to stop.
Finally, although I have mentioned that I must be cautious of aiming for Strava gongs I am pleased to reach one as it shows that I must be getting back on track.