Have posted a couple of times over the last few weeks (continuing to lose weight whilst training and a knee injury I was unsure I should run on) and had some good advice from some people. Anyway just wanted to say that I did it today even though knee still a bit dodgy and now have such an amazing sense if achievement to get back out there and get another one done to improve my time (once knee been seen by the physio).
Really just wanted to say to anyone thinking of doing one to just go for it! Thanks for the support and looking forward to actually aiming for a decent time on the next one now that I have more of an idea what it'll be like.