Can anybody tell any United kingdom's "uk" Genuine website to earn money???

Try mturk, it pays to do small tasks. Also, you can find some tasks in my lot. You can try microworkers too. but you can make only few dollars from doing tasks. if you need more try registering in freelance websites like odesk, guru etc. hope it helps. Also mention your skills so that fellow mylotters can suggest you few programs.