Canary Wharf Jog. 1km course in a tight loop. Started right at the back as arrived only a couple of minutes before. First couple of km were pretty slow with the massed runners in front - but then it is a "jog". Ran with Ben L for the latter ~5km. Last 1.5km hurt quite a lot - did one final km lap to make sure I had definitely done 10km, as had lost count!
GPS had serious issues (all the skyscrapers) but have managed to resurrect my splits based on squinting at the trace. The route was a simple back-and-forth along South Colonnade, with a short section north at the east end, i.e. an L shape.
What I don't understand was that the start line was half way along the main road, but the finish was just before the corner of the "L" - therefore everyone's final lap (or first lap) is not a kilometre - more like 0.75km. Hence why I've logged 9.75km and not 10km! (I appear to have visited the turn at the 300m point 10 times).
Actual course (green = start, red = finish, yellow = first of the two turn-points on the course, at 300m):