In article , "[news]"
says...
paulfoel wrote:
Basically, they're like flat clips which are used hold too flat metal
surfaces together by clipping on the end (sort of like a strong paper
clip).

Any idea what the proper name for them is? I'm trying to find them on
screwfix or toolstation...

U Nuts http://www.namrick.co.uk/browse.asp?PCID=25 2nd from bottom

rare as hens teeth round these parts, blank look from people when I
ask for them so if you're looking local to you, take a picture of em.

Commonly used to fix car panels, so try a decent motor factor.