If you are normally healthy there are many ailments and illnesses that can be easily treated at home with the aid of some common sense advice and a range of medicines you can buy from a shop or local pharmacy.
To help you, visit NHS Choices to find out how you can treat some of those common winter illnesses.
If your local pharmacy is closed, use the NHS pharmacy service search to find other nearby pharmacies and their opening hours. Some are open until midnight or even later, even on Sundays and public holidays
You can also use the service search to find your nearest NHS walk-in centre.
For very urgent cases, you could try calling your GP practice. They should have details of their out-of-hours service recorded on their answering machines. This is the service your GP runs outside their usual opening hours and on public holidays, and should not be used routinely. You can use the NHS GP service finder to find your GP's phone number.