These timbers are old rail sleepers, but the only reason I can think of for them being here, is shipbuilding, there are a few others near by, there was, many decades ago, a shipbuilding industry in this area, the ships would have been constructed of timber.
Uploaded to Geograph by chris whitehouse on 7 June 2015
Photo © chris whitehouse, 7 June 2015. Licensed for reuse under this Creative Commons licence