Creepy Crawlies?

I have no idea what this is, it was about an inch long, and sitting atop a fence post as I was fixing wire to keep Mr Fox out of our chicken run.
I just happened to have my Panasonic Lumix TZ20 in my pocket and here we are, something totally different for my blip.
It had no real colour as such, just a dull greyish black with some faded white bits, so monochrome is ok with it