Socket in 18mm chipboard

[SUNRAY]

Maybe there's a market for sockets etc with their own removable cover on the back, which fixes to the socket, and the socket is then screwed to the plasterboard or cabinet?

I've found a couple with a hole cut in the PB leaving enough where the lugs should be to fix the accessory with no4 screws instead of using a backbox or the brickwork drilled and rawlplugged and no backbox.
Actually I've used that trick myself where the lug is missing, drill through the backbox into the brick and rawlplug rather than disturb the decorated finish to replace the backbox.

 

[ebee]

Maybe there's a market for sockets etc with their own removable cover on the back, which fixes to the socket, and the socket is then screwed to the plasterboard or cabinet?

In an ideal world then yes I reckon.

Unfortunately back in the real world , manufacturers consider what will sell and make them money, sometimes the best idea ever does not successfully take off (or takes too long to do so). Some of the best things ever, never become mainstream. Life is often a fudge, what we would like to be compared to what is readily available.
To make the best idea ever, then produce it, then convince enough people that they need it and to keep the price down so they will buy it, a very difficult thing to do, unfortunately.

 

[Sureitsoff?]

The click scolmore 47mm deep boxes state that max board thickness is 27mm

 

[nero44]

I used 47mm centaur drylining boxes e.g. here in the past to install a box into a laths and plaster wall, as I required extra thickness to pass the plaster and the laths. I can't remember the max depth they do, but they have a spring system for the holders and they were recommended to me precisely for their ability to overcome "thick" walls.

Edit: description says board thickness >> 10 - 26mm