bbc cameras will move in on saturday, but before that, world champion mark williams will take on adam duffypractice table — he makes ends meet by working part—time as a builder. dave edwards has been to meet him. the two sides of adam duffy's working life. the 29—year—old from sheffield got hooked on snooker as a child, watching the world championships at the crucible in his home city. and even once stealing ronnie o'sullivan's towel as a souvenir. i was trying to take it about five times and he wasn't looking so i ran around and nicked it and he shouted at me. but luckily i was a young whippersnapper so i got away from him! does he know now that it was you? i don't think so, no! if he's not practising, here at the star snooker academy, adam is likely to be found on a building site nearby. working for his dad's construction firm. as you can see by this magnificent pointing i've done here, i'lljust be running round doing that and making the job look well. i don't want to say i'm learning the trade because i don't want to obviously end up doing this. but i pick up a lot of stuff and i am impr