The cache is a small clip-lock container capable of taking a few small TBs.
To get to it, you will need to cross a railway line, which you do so at a proper marked crossing, close by Bodorgan station. This is a high-speed railway line, and not all trains stop at Bodorgan. So, please be ultra-vigilant when crossing, and keep children under close control.
Please ensure that the container is adequately covered when replacing.