I'll second Paul's opinion on the image page word for word:
Originally Posted by Paul
It's a lacewing larva for sure; looks very much like Chrysoperla spp (of which C. carnea is one of the most common in NW Europe). Mighty set of jaws they have!
adding that indeed the larva of Chrysoperla carnea
looks exactly like this one (reared those a few times), but that I haven't the faintest as to what the larvae of the other Chrysoperla spp
look like exactly (or those of many of the other Chrysopidae for that matter).