The Green Book Sunday section only applies to drivers recruited after harmonisation. Drivers employed pre harmonisation have their old Sunday agreement with no commitment to work their Sundays. Because of this Paddington historically linked 1 in 2 Sundays, (if you don't want to work, just throw it) the union said it would be unfair on new drivers, who in theory have a commitment, to link more than 1 in 3 Sundays (as this is the average at depots with a commitment). Doing this would have reduced the total number of crew available for Sundays so a local agreement was made whereby the LDC would continue to roster 1 in 2 Sundays but new drivers that started after harmonisation (that have a commitment) will be given a number of wild cards that they can use to throw 8 Sundays a year (taking their commitment to 17 - which is one in 3). However, because drivers with a commitment can get someone to cover their turn, having 8 wild cards effectively means that they don't have a commitment. Simple. I hope I have cleared this up.
