Our experience of monitoring and surveillance in the railway industry has resulted in our involvement in a number of projects relating to safety systems. Over recent years IV has worked towards establishing in-house skills to enable it to take part in the design of high integrity systems and software for use in safety-related applications in the mass transportation sector. We have developed a good understanding of the relevant European standards and are currently working on the system software for two railway applications to be certified to the CENELEC 5012x group of standards.