This would save time and money for patients.
And save time for the surgery.
Some mild antibiotics such as Amoxicillin and Terramycin could be sold over the pharmacy counter without a prescription.
Other drugs which are taken long term (usually a lifetime) such as cholesterol and diabetes medication should be prescribed if requested on one year prescriptions rather than making the patient return for repeat prescriptions often because that is more profitable from the surgery, the pharmacy and the NHS.