It was a bit of a rush to get to the pool last night and by the time the we were allowed in, the session was only 35 minutes long. The shorter window of time focuses the mind though, so I actually had a better workout that normal.
Still lots of breast stroke lengths, but mixed in a few crawl sprints and was starting to cope better with my muscles demanding blood until I raced the last two lengths whilst clearly ignoring the staff blowing their whistles for the end of the session.
As a result I felt a little dishwaterish for a while afterwards, but by the time I went to bed the endorphins had licked in and I felt great! Swimming: good!