The practice assistants - all qualified medical assistants - work for all GPs in principle, but during the morning hours the phone line of your own GP is usually staffed by 2 dedicated practice assistants.
The practice assistants have a wide range of tasks within the practice. You can contact them for making appointments, asking for self-care advice for simple health problems and conditions, administrative matters, etc.
They also have their own appointment-based clinics for wound care, suture removal, ear syringing, wart treatment with liquid nitrogen, injections, blood pressure checks, cervical smears, travel advice, etc.
The practice assistants have professional confidentiality obligations and are required to handle your information confidentially.