This was under the REWARD section of the agreement.
And as you can see it clearly states Royal Mail AND the

CWU reviwed the share scheme so both are to blame if we get no bonus!
ColleagueShare/Lump Sums
As part of these negotiations Royal Mail and CWU have reviewed the ColleagueShare scheme. As a result the scheme has been enhanced in the following areas:
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The 2010 dividend payment linked to business results due to be announced in June has been brought forward and the dividend will now be paid on ratification of the agreement.
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The final instalment of ColleagueShares will be replaced for employees covered by this agreement, by lump sum payments including additional monies bringing the total to £1000 (pro rata for part time employees). These will be known as Transformation Lump Sums and payment is linked directly to key transformation milestones.
Additionally both parties recognise that ColleagueShares operates in a way that replaces our traditional approach to productivity and that only by reaching this agreement and working together to deliver transformation will the value of ColleagueShares be higher. The current value is £1.51 per share. They will be bought back by the company in two equal parts in 2011 and 2012.
1200 8th March 59
Year 1. April 5th 2010 – 2% Increase to basic pensionable pay flowing through to all allowances London Pay Range, overtime and SA rates.
£400 lump sum (previously final ColleagueShares dividend) paid to all employees upon ratification of agreement.
Year 2. April 2011 – 1.4% increase to basic pensionable pay flowing through to all allowances, London Pay Rate, overtime and SA rates.
ColleagueShares buy back 1 currently valued at £536 per employee.
Year 3. April 2012 – 3.5% increase to basic pensionable pay flowing through to all allowances, London Pay Range, overtime and SA rates (re-opener clause).
ColleagueShares buy back 2 currently valued at £536 per employee.