Have you ever done it like this?

if that is two lengths of red and black to an all plastic light switch with no CPC terminal on the switch, then yes I have. I may then put both CPCs into one sleeve so that loop is continuous even if the screw rots off, as it seems to be doing here.  Do not try toi use it like square choc block without a lot of doubling over, the 1mm2 tends to fall out the sides.

Going back a few years now, I have also been known to create  a terminal for a CPC to anchor down, in an older back box without one, by use of a self tapping screw and a screw cup washer

Mike

if that is two lengths of red and black to an all plastic light switch with no CPC terminal on the switch, then yes I have. I may then put both CPCs into one sleeve so that loop is continuous even if the screw rots off, as it seems to be doing here.  Do not try toi use it like square choc block without a lot of doubling over, the 1mm2 tends to fall out the sides.

Going back a few years now, I have also been known to create  a terminal for a CPC to anchor down, in an older back box without one, by use of a self tapping screw and a screw cup washer

Mike

The cables are one twin and earth plus one single with insulated green earth. The loft is full of assorted junction boxes under thick loft insulation. Such fun.

Z.

Problem with these is that they squash down and not so good.