Walking through the Meadows, on the south side of Melville Drive heading west, didn't really notice a cyclist going past me, then definitely noticed a convoy of 5 or 6 police motorbikers, and really definitely noticed the front one slowing down and gesturing very angrily at the (unlit) cyclist. I was about 20 yards away and had my mp3 player in so couldn't hear exactly what he was saying, but could hear that he was yelling something at her. I assume it was about her having no back light, or that her back light (if she had one) was obscured by her jacket. He didn't stop, or make her stop, and she carried on her way after they'd all gone, but it looked like she was getting quite a telling-off.