I am a postman and voted in favour of the industrial action.
Agreements that were agreed by the Royal Mail in relation to working hours, pay and pensions were in place only for Rico Back to come in (with his multi million pound bonus for taking control) and decide he wasn't going to honour those agreements. He wants to sell of parts of the business and separate parts of it such as parcel delivery. He wants to introduce parcel sorting machines which would mean 1 in 6 posties lose their jobs.
Work load over the past few weeks and dramatically increased due to Christmas approaching, kids back at school etc. Over the summer due to lower rate of mail we all agree to take a section of another round (called absorption) which we are all happy to do. Absorption is then supposed to finish when the work load increases. I know in my section this isn't the case.
Like FalmouthOx said, if you are at the end of the round and its been a heavy day and your postman can't or isn't willing to go over their time then the mail gets returned to depot.
We also have had situations where there has been a shortage of staff (due to Royal Mail not wanting to increase staffing budgets) which has meant managers asking for favours from Posties to take at least another half of a round. I have been willing to do this up to a point but now it is so busy I physically can't keep doing it 3/4 days a week on top of my existing round (average walk of a post round is 10 miles per postie).
Even though I'm not a labour voter, the best thing that could happen to the royal mail is to nationalise it again.
From a meeting with the CWU last week, it wasn't thought a strike would take place before Christmas however with this result I can see their being action taken sooner than that. I voted yes not because I wanted to but because I knew for job security it was the only option I had.