March Networks, provider of IP-based digital video, will fit its Bombardier Sekurflo system to 190 new trains on the London Underground's sub-surface lines, where the trains run about 5m below the surface.

The systems for Metronet Rail will be installed in the new trains during their manufacture at Bombardier's plant in Derby. The first new SSL train will enter passenger service on the Metropolitan Line in 2009.

Sekurflo will be used by staff to capture video for monitoring the flow of passengers and supporting the efficiency of operations. It will incorporate intelligent video analytics.