Scott's achievements are quite remarkable. He was the first Welsh Person that finished many endurance races. I'm not gonna give out too much in this description. Best would be to hear it from him ... the races he ran, the training he puts in, his goals and his work for the Operation Smile charity. If you want to find out even more about Scott you can browse through his webpage. 
If you will stick to our chat to the end you'll also get some advice. What he said works for those who just started running and for those of us already running for years.