Signs of the past

As the caption reads, examples of the steel matting used to stabilise muddy English fields in order to take the weight of heavy aircraft.<br>

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Further reading: <br>

<a href="http://en.wikipedia.org/wiki/Marsden_Matting" class="bbc_url" title="External link" rel="nofollow external">http://en.wikipedia....Marsden_Matting</a><br>

<a href="http://en.wikipedia.org/wiki/Sommerfeld_Tracking" class="bbc_url" title="External link" rel="nofollow external">http://en.wikipedia....erfeld_Tracking</a>