S
saxondale
But a PIR is not covered by "extra-low voltage wiring for the purposes of communications, information technology, signalling, control and similar purposes".
However, 2B (2):
2. Work which—
(a) is not in a kitchen, or a special location,
(b) does not involve work on a special installation, and
(c) consists of—
(i) adding light fittings and switches to an existing circuit; or
(ii) adding socket outlets and fused spurs to an existing ring or radial circuit;
makes installing a PIR in a kitchen notifiable.
PIR - passive infra red - part of the alarm system - 12v dc - signalling, control or similar .............etc etc
nothing to do with a light fitting or switch
sorry but this is my area of knowledge