This book presents the refereed proceedings of the International Symposium of Formal Methods Europe, FM 2005, held in Newcastle, UK, in July 2005.

The 31 revised full papers presented together with three invited contributions and extended abstracts of 6 invited industrial presentations were carefully reviewed and selected from 130 submissions. The papers are organized in topical sections on object orientation; resource analysis and verification; timing and testing; CSP, B, and Circus; security; networks and processes; abstraction, retrenchment, and rewriting; scenarios and modeling languages; and model checking.