One of my rare outings for reps on my circuit of about 1100m on the University playing fields. Four reps, timed at: 4:48, 4:55, 4:48, 4:47; much slower than last time I did these reps (which I think was last year}. I actually felt that I was really struggling on the third one, whereas the second one felt better.
One reason for doing this session was to get a bit of relief from being plastered with mud on my usual routes: playing fields have drainage, and there's a route from home to the University which is mostly grass but without any seriously muddy bits.