Marcellus - Thnx for the work you have put in to this. It is the real way to measure things. I was thinking the same way however something has been pointed out in the thread that you appear not to have taken in to account.
The 3% wage rise was not due until July 11. So if 4.5% is paid in Jan 12, it may have been paid a little later but it is not a wage freeze because the increase ultimately went in (the 1.5 for 6 months).
Be interesting if you added a mid point in the chart. I reckon the loss is bugger all. Certainly it wouldn't cover the 178mill the dispute cost them.