There are a few places in my area with this sort of stuff, and it may well  work for years, but it is not confidence inspiring, if it is on a ring I'd be wondering about the 4 wire joint. However looking at the depth of the grubs, is it actually 2,5mm or thinner? More context required to decide if just ugly or really dangerous. Mentally a

'further investigation needed' and

' here be dragons - trust nothing in this place to be quite as it seems '

Mike

There are a few places in my area with this sort of stuff, and it may well  work for years, but it is not confidence inspiring, if it is on a ring I'd be wondering about the 4 wire joint. However looking at the depth of the grubs, is it actually 2,5mm or thinner? More context required to decide if just ugly or really dangerous. Mentally a

'further investigation needed' and

' here be dragons - trust nothing in this place to be quite as it seems '

Mike

The junction box wired in 2.5mm2 T&E and 1.5mm2 flex supplied two double 13 Amp. sockets inside, and one reverse polarity connected outdoor double socket, and a faulty pond pump. All now run through a switch fused connection unit with the faulty pond pump disconnected. The grub screw issue was a red haddock.

Beware Red Haddocks, they can be a vexation. Also Red Herons . For they too have their story

A Stanley Unwinism!

Stanley Unwin - Bing video

Z.