FAKE Train Horn Warning Unit

This is a Covtec 'Supplementary Audible Warning Device'. They are installed at some foot crossings in Kent with a plan to install more at other crossings. It works by playing a recorded train horn sound to warn crossing users of an approaching train. They are called supplementary as they are supposed to supplement the real train horn which could be missed. This one is installed at a foot crossing near Broad Oak Road Level Crossing in Canterbury, Kent in England.