Back continues to be troublesome. Usually if I can get through the warm-up for an intervals session it's OK once I get going, but not so tonight - knew on the first rep that it was going to be a problem. Bit of a setback this week after a decent stretch; perhaps I shouldn't be too greedy (relatively speaking).
Spotted a police helicopter, but I think it reasonable to assume with hindsight that they
weren't looking for people sitting on park benches.