Caught a couple of spiders on the reserve - one by accident while trying to net a bee! It turned out to be a male of the previously found Metellina mengei. You can see the dark band in front of the fold here on the male too. Hope I posted the female previously or that will make no sense!
And here's the detail with the picture from Roberts' spider book showing the structure of the adult male palp.
The other spider was an immature male - swollen palps but no structure. From the eye formation it seems to be in the family Lycosidae, genus Pardosa. For some prey this would be the last thing they ever saw!