Click PRW210 45 Amp Shower Pull Cord Switch with Neon and ON Off Indicator 45A : Amazon.co.uk: DIY & Tools
David Savery Electrical Services Ltd. - Top tip: Shower Isolators
Wessex White Shower Pull Cord 45A Neon | Toolstation
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