The National Health Service (General Medical Services Contracts) Regulations set out in regulation 25 the circumstances where a fee may be charged to an NHS patient.

The National Health Service (General Medical Services Contracts) Regulations 2015 (legislation.gov.uk)

This regulation confirms that GP providers are permitted to seek fees for services such as those listed below:

• Medicals for pre-employment, sports and driving requirements (HGV, PSV etc.)
• Insurance claim forms
• Private letters
• Prescriptions for taking medication abroad
• Private sick notes
• Vaccination certificates