Rain stopped play.
I guessed it would but thought I'd pop along anyway in case they were going to try and get an hour or so in. Got there and there was 1 bloke getting some laps in and nobody else.
How do you know in advance if it's cancelled? Obviously if it's actually raining take it for granted, but at the time it wasn't and there was still blue in the sky. I think an hour would have been possible.