Almost 700 of KFC's 900 UK outlets have reopened following a chicken supply fiasco that began about a week ago and forced many stores to shut their doors.
However, the fast-food chain has not said how many are serving a full menu.
KFC said on Wednesday that some would remain closed for the rest of the week, while others will have shortened hours.
The closures followed KFC's decision to switch suppliers from Bidvest to DHL, which is using a single warehouse near Rugby for deliveries nationwide.
DHL has blamed "operational issues" for the supply disruption from the purpose-built facility.
KFC said more chicken deliveries would be be made to outlets on Thursday as teams "
continue to work flat out all hours to clear the backlog caused by the breakdown in the DHL distribution system".