English: GPSS marker plate, near to Heydon, Cambridgeshire, Great Britain.
A closer view of the marker seen in <a href="https://www.geograph.org.uk/photo/833270">TL4241 : GPSS markers</a>. S/SW indicates that this is on the Sandy-Saffron Walden link, and km 24.0 is the distance from Sandy. The up-arrow indicates that the normal flow is away from the observer looking at the notice. SGE are the operators of this section - Serco Gulf Engineering of Saffron Walden. This is probably an Official Secret.
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== {{int:filedesc}} == {{Information |Description={{en|1=GPSS marker plate, near to Heydon, Cambridgeshire, Great Britain. A closer view of the marker seen in <a href="http://www.geograph.org.uk/photo/833270">TL4241 : GPSS markers</a>. S/SW indicates that