Greggs breakfast service generally ends at 11:00 AM across the UK. Breakfast hours typically start as early as 6:30 or 7:00 AM, depending on the location, and finish promptly at 11:00 AM every day, including weekends. On Sundays, breakfast often starts a bit later but still ends by 11:00 AM. These times can vary slightly by specific store, so checking the local Greggs outlet or its app is recommended for precise hours.