The Dyke is old news to us now (ahem) so we headed West for a kilometer or so across the South Downs Way. At roughly 4.30ish the light was fading slightly so we decided to head South through the valley, following the decending pylons. I was aiming for this particular cache and dragged us off course a little (being on a parallel road to the track we were on) but eventually we reached the very lovely Mile Oak Farm and spoke for a few minutes with a very nice local man (possibly the proprietor?) who was beaming at the lovely evening. By this stage I had realised I couldn't make the cache I was heading for and had rerouted us towards one over the Shoreham By-Pass tunnel.
Heading under the motorway and further down Mile Oak Road I was gutted that we seemed to be moving away from the destination but I spotted a pedestrian laneway which lead back up to the hills above the tunnel. After a few minutes wrestling with some pretty tough gorse bushes before the light completely disappeared I had located the cache and dropped a triple-ziplocked cassette into it. Great site but the box definately needs waterproofing.
Photo taken from here.