UK: Is it safe to bypass a light switch?
You can


Replace the switch with a key-operated switch. The type that have a slot for a "fish key" are probably the cheapest.
Replace the switch with a 1-gang coverplate and connect the wires using a suitably rated (e.g. 5A) screw-terminal block. I don't know if this is legal. To replace the lightbulb you'd then have to go to the consumer unit (main panel) and turn off the MCB for lighting to that whole floor.



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switch and key are each about £1.20. That is cheaper and better than the alternative.