Thank you for your suggestions, I will try the chatting to mum at night and see if this helps. He is not a footballer but does play tennis, go on the trampaline, ride his bike and karate.
Tell your son every time he gets up during the night to come wake you up. Go into the living room and sit on the sofa(no TV or anything) and just have conversations. Hopefully, he will decide on his own to go back to sleep. I know my 11 year old does not want to have conversations with his mom in the middle of the night. He probably wakes up during the night and does not know how to put himself back to sleep. Of course, the temptation of all the games and stuff are hard to resist. My son has already gotten up during the night himself a few times and went put on the TV. I make him go to bed no later than 9 at night. He sleeps in a pitch dark room(his choice) and his room is always cold. He sleeps through the whole night and sometimes when I wake him in the morning he is completely buried under his comforter. But, he likes it that way and he is sleeping all night. I don't let him play alot of games during the week with school also.
I'd try to get him to be more active in the day, more physical exercise. It will help him be tired at night, and also maybe reduce the compulsion to play computer games.
He cant play Nintendo if you remove it can he, as for reading well if he cant sleep maybe tell him its okay to read with his own light on for say an hour the help him nod off again , no lego thats too stimulating, reading is okay , no TV ...If you unplug all the Electronics and tell him if he tries to go on them he will have to do without privileges,no TV or PC the next day.Its in your hands ,get tough on him ...its not good when he is tired and grumpy the next day ,you are the parent ...