Thanks for your comments guys,
I am sick and tired of being harangued by management to stop this practice.
I'm told it wastes Conduit wire.
Considering that the management are'nt doing the job, now or in the future, I think it is a situation of keep mouth closed.
I was talking to a Builder during Smoko today and I think this idea went right over his head, because he said "Well other guys from the previous job don't leave me wood to work with do they?".
I was lost for an answer.
Sure, I've used the draw-wires of a competitor Company and they've used mine and we all pull them back through after their use has finished.
Common courtesy really.
Another question, how many of you guys have found in a particular existing Installation, where the Original Sparky only bored the holes in partition walls to allow his cables only?.
These sorts of people really annoy me and I never use an Auger bit smaller than 25mm diameter, usually using a 32mm bit, it just makes it so easy to put wires in later, should the need arise, and it usually does after customers change thier minds.