Caterpillar. Could not find in Manley.
No interactions present.
...but there can't be many caterpillars with markings that look like 'Space Invaders' on their back! ;p
it would be easy to find. But It's not in either of my guides either!
But I found a web page:
where there are photos that show the considerable variation that exists. And I think it's right.
Well done that person!
Lat/Lng: 51.5, -0.4
OS grid ref: TQ1689