Fen Gallop 10K is a very nice cross-country 10 kilometers long race. It is my favorite one in Cambridgeshire. This run is halfway between a road race and a trail race and the route varies among these things: tarmac, grass, paths, ruts, dirt roads, mud, puddles, fields and wooded areas.
London 10,000 is one of the biggest running races in the UK where more than 12,000 people run in the city center of the British capital. It is organized by the same team who organize the London Marathon — and they did a great job.