uneasy pictures

I wanted to re-visit site C (military site) to take hedgerow pictures again, this time with the Sigma Merrill which has edge to edge sharpness, nicer tonality and richer colouration. I slowly trekked for half a mile around the other side of the airbase's perimeter fence before headed back to the section I'd looked at yesterday. A vehicle appeared to follow me off the side road which made me uneasy, more unsure than ever what explanation I'd come up with should some security official decide to intervene, I'm not sure about the legal position photographing there. But no-one got out and they'd left by the time I'd finished photographing.  The unease though that I'd felt from their presence was maybe pertinent to the wider theme of these pictures.