Below is copy from SDD agreement, this remains in force.
Health and safety issue also
e) Saturday attendances will be significantly shorter than weekday attendances. To assist this Mailsort 3 need not be scheduled for delivery and missort runs should be rescheduled to enable an earlier start on town residential delivery routes.
f) Providing meal break/working time regulation rules are observed, employees will have the flexibility to plan the timing and location of their meal breaks. This flexibility also extends to the ability to have a refreshment break prior going out on delivery as long as it does not compromise the office workplan. Where deliveries are completed within the agreed office workplan then employees will be allowed to pouch off without returning to the office.