British Rail double arrow logo (positive version)
Gerry Barney of Design Research Unit
Extracted from <a rel="nofollow" class="external free" href="http://www.nationalrailguidelines.co.uk/download.php?filename=pdfs/NR012.pdf">http://www.nationalrailguidelines.co.uk/download.php?filename=pdfs/NR012.pdf</a>