http://www.ukemergencyaviation.co.uk/Derbs-Leics-Rutland-Air-Ambulance-Information.htm The service now serves over 3850 sqmi Less than a year after Derbyshire, Leicestershire & Rutland Air Ambulance became the sister service to Warwickshire & Northamptonshire Air Ambulance, it flew its 1,000th mission on 17 January 2009.