Long swim

Conscious that I haven't done a straight swim in a while, so I did that today. Just 40 mins to spare so it was a cursory warm up. To save counting I just hit lap on my watch every 6-10 lengths, to work out my speed and see how it varied over the swim. Average time (secs) per 25m over 10 unequal intervals:

32.0
32.2
31.8
32.1
31.9
32.1
31.9
31.9
31.0
32.5

Total 1900m, 40:30 total time. 50m WU at the start wasn't ideal but never mind. I felt slow for the first half, then felt faster but really wasn't going too much faster looking at the times! I stopped at what I thought was 40 min, with a couple of quicker ones, but then realised I had another 2 minutes to go - bummer. I guess I could count that last section as cool down ;)