The safe method will be to remove the "traveler" (connecting conductors between fixtures) and reassemble the still operative fixture, or contain the terminal block within a chocbox or a ceiling rose with a surface cover.
It is a common practice, on this side of the pond, to allow enough cableing to actually remove the recessed fixture to access the "junction box" connected to the fixture, for corrective/amending of applications.
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Illigitimas non-carborundum
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