I spent a little while crouched down amongst some nettles looking at all the insect life on them.
At first I thought this was a type of crab spider, but I've identified it this morning as a 'candy striped spider' - Enoplognatha ovata (from Greek - Enoplos meaning armed, gnathos meaning jaw or mandible and ovata meaning egg shaped).
This one, with the two red stripes. is the redimita variant. I learned all this from the British Arachnological Society page, a website I often find myself on when I look up spiders!
@flowerfairyann yes, the camera is pretty good! I wasn't right in the middle of the nettles (I did get a few stings but I'm used to that so don't bother really!)