Historic course running by all the top sites in London. The fans were incredible cheering the runners on during most of the race and especially loud/supportive in many sections. The course itself I thought was very flat if not downhill much of the time, especially in first half of the race. The biggest uphill was running up the Tower Bridge but the incline was so gradual it was a piece of cake. This should be a PR kind of course for you. The water they handed out was in little bottles which I thought was odd. I was worried about tripping over them but it wasn't an issue. The race start was a bit slow for the first mile+ even though I was in a coral toward the front. If you are further back, be ready I am sure to zig zag for a while through runners. You might want to be at the front of your goal time corral. I would highly recommend this race for the flat elevation, great fans and awesome city to have a pint in post race!