The shower pull cord isolation switch has been wired incorrectly, which is concerning because a professional person would know that it is important that any switch with a neon light on it
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Shower Ceiling Pull Cord Switch & Pattress Box, 45 Amp Double Pole Neon Electric : Amazon.co.uk: DIY & Tools
Omega 45A DP Ceiling Pull Switch White (OM45CS) | CEF