Union leaders say thousands of letters and parcels are lying undelivered at a sorting office in Bristol.
They say postal workers can't cope with the amount of mail they're being asked to deliver. Royal Mail has drafted in managers from other areas to help deal with the backlog.
More top news
A 26-year-old man's daily acts of kindness have won him an army of online fans.
An 82 year old woman from Cheltenham has been jailed for stabbing her husband because she believed he was cheating on her.
A young woman from Somerset is about to spend her first healthy Christmas in years after receiving a liver transplant.