If you are on Royal Mail books you are entitled to 30 mins paid meal relief see below.
Delivery persons also get a delivery supplement but may apply to new recruits ,better ask a union rep.
You working 6.5 hr shift.
How many days are you working?
Less than 2 hours 30 minutes none
2 hours 30 to 3 hours................10 mins
3 hours 1 to 3 hours 30..... .......15 mins..
3 hours 31 to 4 hours 59..... .......20 mins
5 hours to 7 hours................... 30 mins
7 hours 1 to 8 hours 59..... .......40 mins..
9 hours to 10 hours 59...............50 mins
11 hours to 12 hours 59..... .......60 mins.
13 hours or longer..... ..............70mins