NEW DECEMBER 2020.  The single line through Berney Arms runs from Reedham Junction, where the line from Norwich to Lowestoft diverges, to Breydon Junction on the approach to Yarmouth Vauxhall.

The item here is a twelve-page typescript document issued by H H Mauldin at Liverpool Street on 31 August 1936.  Its title is 'Regulations for Train Signalling on the Single Line between Reedham Junction and Breydon Junction by Special Electrical Train Tablet Instruments'.

The line was normally operated under the absolute system, meaning that just one train which was in possession of a token could occupy the line at a given moment. More capacity was needed at peak holiday periods, and these regulations enabled the line to be worked at such times under something called the permissive system. That would permit a second train going in the same direction to enter the token section - the two trains would need to be kept apart in separate blocks, but this could be achieved by switching in a box at Berney Arms. No train could of course use the line in the opposite direction until the final train in the sequence had cleared.

The booklet describes how the arrangement was to work. No maps are included.

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