When the surgery is closed, please dial 111. The NHS 111 service was introduced to make it easier to access medical help or advice in cases where the situation is not life-threatening (IN that event you should of course dial 999).
The 111 service provider (Derbyshire Health United) will make an assessment and direct you to the most appropriate point of care for your particular need. You can also call 111 if you simply require health information. The service is available 24/7 365 days a year and is completely free of charge whether you call from a landline or a mobile phone.