- 3 updates
Kevin Gilliland, network and sales director at the Post Office, said the Communication Workers Union's (CWU) decision to strike will "cause disruption to customers."
The Communication Workers Union deputy general secretary Dave Ward said post workers were striking today due to the "reckless attitude of the post office".
Mr Ward added that the strike, which will affect up to 4,000 staff in 372 offices today, could carry on into the Christmas period.
Staff at hundreds of Crown post offices will today stage a fresh strike in a row over jobs, pay and closures.
Members of the Communication Workers Union in England, Wales, Northern Ireland and most of Scotland will walk out in the 12th round of industrial action since Easter.
The union is opposed to plans to franchise or close 75 Crown offices, the larger sites usually found on high streets.
Some staff will be taking other forms of action including a sales ban on financial products and services.
The strike today will be followed by action in a handful of branches in Scotland tomorrow.