More than 500 of the chain's almost 900 stores are still closed, while many of those that are open are offering limited menus or have cut their hours.
The company said they would not lower their expectations on the quality of their chicken, therefore leaving restaurants closed or with a smaller menu.
"We know that this might have inconvenienced some of our customers you over the last few days - we're sorry about that".
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In a message posted on its UK Twitter account, KFC said "our teams are working round the cluck" to reopen all restaurants.
The branch is among those with no chicken, flour, sunflower oil or fries available at the moment.
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KFC branches across Merseyside remained closed today after a nationwide delivery issue left many without essentials - including chicken. KFC's bird-brained decision has caused untold misery to customers, to Bidvest workers and restaurant staff who are not being paid", Mick Rix, the national officer ofthe British trade union GMB said in a statement.
We are working with our partners, KFC and QSL, to rectify the situation as a priority and apologise for any inconvenience".
Bidfood added: "Following a seamless transition from Bidvest Logistics, KFC moved their distribution to a new provider from Wednesday 14th February".
Franchisees operate 95% of KFC's outlets in the country.
More than 700 KFC stores have been shut due to a chicken supply upset.
KFC spokesperson Tori Oman said it was an "isolated issue" in the United Kingdom that the company is working hard to rectify.