Well I met my goal. Completed my first 100km. I actually did 66 miles but didn't restart my Garmin after a short stop. I only noticed when it turned itself off.
I'm not feeling too bad. I got the food and hydration right today. 13 weeks to the London 100. For the first time I'm confident that I will do it. I need to shift a couple of stone. Still just over 21 st. I may focus on more shorter faster rides for a couple of weeks and cut own on portion size. I may be overcompensating on the weekend 50+ mile rides.
Very happy with my progress though. Average heart rate below 140 and cadence around 80 over 5 hrs. Even with some dodgy HRM readings. It frequently increases but once I take the strap off and put it back on it goes back to normal.
http://app.strava.com/activities/52479056