The fact is PCS and Engineers were right to believe there was no more money in the pot... There isn't!! They don't have the money to pay for the increased ATCO offer. Simple as that.
As mentioned they have said it will be funded from existing budgets. What this really means is that they will fund it by cutting costs/jobs/conditions.
The PCS and Engineers ballots were set aside as soon as an offer on basic pay was made to ATCOs. So we all have to be balloted again, once management give us an equally acceptable offer. So don't hold your breath.
It always pays to read the small print....