So disappointed with myself. Nice sunny afternoon so I tried W6R3 but had to stop short about 90 seconds from the end of the run. All the way round I was finding it hard to breathe and coming towards the end I felt a bit wobbly. (I suffer from vertigo which isn't great for exercising) I finished the walk slowly, but with my head down and feeling sorry for myself nearly got run over by a cyclist as I crossed the path. My fault entirely no damage done. But not a good running day. At the moment I can't envisage doing these long runs three times to the end of the programme.