Our Clinical Support Desk – driving change in your local ambulance service Posted on 23/04/2012 NARU»News Wire»Ambulance Trusts»South Central Ambulance Service»Our Clinical Support Desk – driving change in your local ambulance service Based in Bicester (Oxon), Wokingham (Berks) and Otterbourne (Hants) South Central Ambulance Service NHS Foundation Trust’s Clinical Support Desks (CSD) form an integral part of your local ambulance service’s Emergency Operations Centre.