I have just answered this on your diary but that was before i had seen this beautiful new thread...
Last week i definitely found the middle session way more difficult than the one either side, not looking forward to tomorrow, 2nd session of week 2 I think i might keel over at the end Lol. Fortunately i am going with my mate from work and my OH both being boys (6ft and 6ft5) they make me keep going or i get left behind with my comparative little legs. I think we are going to run down the south bank of the Thames again which makes for a nice view. Kind of looking forward to it and kind of scared at the same time lol.