Thousands of Post Office workers are striking over pay. The dispute is separate from the current row over pay and condition at Royal Mail.
Members of the Communication Workers Union (CWU) are taking action for 24 hours. CWU official Andy Furey said the union had to call a strike because its legal mandate for taking action was about to expire.
The union said the Post Office had increased the pay offer for 2022/23 from an initial 2% with a £250 cash lump sum to 5% with a £500 cash lump sum. But it said this was still “some considerable way behind” current inflation levels.