Alamy
GREGGS has declared war on “zombie” customers who keep their headphones on while at the counter.
Staff at the bakery giant have threatened to not serve punters listening to calls or music when they are meant to be ordering.
GettyGreggs have threatened to not serve punters listening to calls or music when they are meant to be ordering[/caption]A sign at one branch warns discourteous diners they could miss out on their favourite sausage roll or steak bake if they refuse to pay attention.