Don't Canada and USA use green (or green/yellow) PVC sleeving over bare earth (ground) wires. To me, in the UK, this wiring looks very scary!
It looks scary to me (in the US) because of the wires poking through the small holes.
My father (actually trained as an electrician) did some wiring at home that eventually haunted me. An outlet lost a ground all because the grounds were twisted but not wire-nutted. Eventually an oxide formed and no ground for down stream outlets.
In the 1960's house, the 120V outlets were two prong polarized. A ground was run to the outlet and the outlets had metal plates, Upgrading was a little bit of a pain because no ground screws existed in the 1960's and the box and outlet have to be grounded separately.
There is a ground clip available that will mechanically attach a solid wire to the edge of the box. There are ground pigtails.
there are these
things.
and these
This would be used to attach to the ground lug of the outlet itself.
These
are not made anymore. They came in white, black and green with or without the fork terminal. I really liked them.
You could do the black/white daisy chain and the ground connection and connect to the outlet really easy with the fork terminal.
The other end is a wirenut.
This **broken link removed** link shows the powertails which could be a decent substitute for termanuts. Then there is the ground clip and the various ground wire pigtails.
New work in a modern box with a tapped ground hole, it all
works out.