Well there were lots of mini reasons which will all sound like excuses, the worst of which was a terrible side stitch just after half way through, then an enourmous tractor at 13 minutes which I was forced to stop (in some nettles) to let pass and then stitch got so bad I struggled to start again. Walked for seven minutes to try and get rid of stitch and had to listen to Laura telling me how wonderful I am. Felt so bad that I rewound the podcast to halfway through and ran for 10 minutes. So I DID do 20 minutes - just not all at once. And I suppose 13 minutes and 10 minutes is still longer than W5R2, so I mustn't feel too bad. Will try again for 20 mins today.