BGTXINGI 3 Sets 16mm 5 Pin Metal Momentary Latching Push Button Switch 1NO 1NC Self-locking 12V DC On Off Stainless Steel Flat head Waterproof LED Ring Illuminated Switch with Wire Socket Plug :
63 amp Switched Interlock 5 pin Socket with din Rail for MCB RCD etc 380V - 415V IP67 3P+N+E Waterproof red Triple Phase Interlocked Connector 63A : Amazon.co.uk: DIY & Tools
ESR 16a 4 Pin (3P+N+E) Red IP67 Industrial Switched Interlock Socket 415V - SI16546 at TEW Electrical
ESR 63a 5 Pin (3P+N+E) Red IP67 Industrial Switched Interlock Socket 415V c/w Din Rail - SI63546 at TEW Electrical