KFC recently took on DHL as its delivery partner for its 900 sites in the country, replacing former distributor Bidvest.
However, the inability to get product to shops has led to numerous closures all over the UK and Ireland.
In a statement, KFC UK & Ireland said: “We’ve brought a new delivery partner onboard, but they’ve had a couple of teething problems – getting fresh chicken out to 900 restaurants across the country is pretty complex.
“We won’t compromise on quality, so no deliveries has meant some of our restaurants are closed, and others are operating limited menu, or shortened hours.”
KFC’s new delivery provider apologised for the situation and said it was handling the issue as a priority.
A DHL spokesman said: “Due to operational issues, a number of deliveries in recent days have been incomplete or delayed. We are working with our partners KFC and QSL to rectify the situation as a priority and apologise for any inconvenience this may have caused.”