Timely access to genitourinary (GU) medicine services is important in the control of sexually transmitted infections (STIs). A target has been set that by March 2008, 100% of patients will be offered a GU medicine appointment within 48 hours. Strategic Health Authorities have also been asked to plan for 95% of patients to be seen within 48 hours. We sought to identify why patients decline appointments offered within 48 hours by collecting prospective data over three months. Additional data was collected over 18 working days to identify if alternative options would be acceptable to decliners. Overall, 1577 patients contacted the clinic, 1524 (96.6%) were offered a 48-hours appointment, 1108 (72.7%) accepted it, 416 (27.3%) declined it and 66.3% citing work commitments as the reason. In 118 patients, who declined the appointment offered; 43.2% indicated no alternative option was acceptable, 23.7% chose a Saturday appointment, which in 78.6% would have exceeded 48 hours. Hence, 73 (61.9%) patients would not have accepted an appointment within 48 hours. The balance of public health control, mixed service provision and informed patient choice is discussed.