Signal box, probably contemporary with the adjacent travelling bridge (i.e. sliding bridge, not a swingbridge) of 1889 between Dock No.1 and Dock No.3 basin.
The box is a wooden Barry Railway type 1 signal box, now out of use and boarded up.
Inside is the original lever frame of seven levers, with a further adjacent lever. It is believed to be the last surviving example of an all-wooden Barry Railway type 1 signal box (another type 1, but on a brick base, formerly stood at Barry Station, nprn 414101)
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Sources include: Peter Kay, Signalling Atlas and Signal Box Directory (Third Edition), Signalling Record Society, Wallasey, 2010, p.70; Network Rail, Signal Box Register (undated). For further information on the types and designs of signal boxes see: The Signalling Study Group, The Signal Box - A Pictorial History and Guide to Designs, OPC, 1986.
RCAHMW, 17 March 2015.