The objective of the CiviL Airspace Integration of RPAS in Europe (CLAIRE) project is to fly RPAS in controlled and non-segregated airspace in comparable treatment with manned aviation. The project comprised incremental demonstrations, working from real-time simulations on the NARSIM simulator to live-trials. NARSIM Tower and Radar were coupled to simulated the airport and TMA environment and traffic, while NATS controlled the en-route airpsace. NARSIM was also connected to an external Thales RPAS simulation environment and ground control station. Different scenarios were simulated such as a loss of datalink with the RPAS, engine failures and communication failures to evaluate procedures. Overall the simulation helped in evaluating operational procedures of RPAS from the airport to en-route.