Anyone can tile, anyone can plumb, anyone can do electrics and so on, i'm not so sure it's any one trade, i think that it's rife across all trades. Not sure of the reasons, price is one for sure, but also the customer's to blame as well. I go round so many houses to hear the words can't you just quote for the lot like the last guy did????? go figure. I feel it will go full circle and individual trades will slowly just return to there respective trades as more of these problems come out, the guy's doing them will shy away. That's what i'm hoping will happen anyway.