We could probably start a support forum for contractors not doing what's been agreed, never being on site and ultimately the project running over time and expenses.
Walls are almost up on the 2nd floor, after a 2 day search we have bricks, this is despite the fact that I still have 2000 outstanding on a previous order from another supplier and all other shops stating at least 5 working days to 15 working days delay. Had to get them from Pta though which cost me a bang on transport (ironically still cheaper than my local building superstore 2km away).
In short if you have a project on the go, or will have one in the next few months, and you need cement or bricks it might be worth securing supply now.