So W2R1 I went too fast & barely survived the final run. W2R2 I went much slower so my breathing was fine, however, I had a cup of tea & biscuits at 14:00 & didn't eat anything before I went for a run at 17:30. BIG MISTAKE! My legs were crying after the brisk warm up walk! I really hope, with the lessons learnt, the next run goes better as I haven't enjoyed W2 at all so far.