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The location(s) at which the protection will be provided; • The time at which the work will start and the time by which it must be completed; • The locations(s) where the work will be taking place. This is what the COSS needs to agree with the Signaller before permission can be granted to take a line blockage.

You must make sure that the red flag or light is placed in the four foot where it will be clearly visible to the driver of an approaching train on that line. You must do this in both directions if: You are working on a single or bi-directional line; • Single line working is in operation on the line concerned.

4 During the line blockage You must make sure that the red flag or red light is placed in the four-foot where it will be clearly visible to the driver of a train approaching on that line. single line working is in operation on the line concerned.

A line blockage is achieved by placing a 'Protecting' signal or signals to danger, this is arranged by the signaller. An authority number is given to you by the signaller. TAKING A LINE BLOCKAGE.

Before you go onto or near the line: This includes safety boots, a hard hat (white or blue) and orange high visibility clothing. You may not wear yellow, red or green clothing or hard hat because these colours are used for signals on the railway. Know the speed and direction of trains. Know any other hazards.

In context with a line blockage, when can you pass a signal at danger? If work that affects the safety of the line is taking place within 200m of a signal, the previous signal must also be kept at danger. The signal may be passed at danger to access a station, siding or crossover for single line working.