wrote in message
...

If someone wants to enclose a TV/monitor in a MDF+perspex
cabinat units with no access to remote sensor or power button,
insufficient ventilation at the back, are there any electrical
regs/PAT type rules that this would contravene?

Surely, every electrical item must have its access to power switch (even
via
an access slot under lock and key) readily accessible in case of mishaps.

Not necessarily if its easy to turn it off at the wall socket.