I bought these relay boards to wire in the relays.
I soldered and connected them up and just couldn’t get the relays to work on the layout. After quite a while of programming, re-programming and generally not working out why the lamps lit all the time… I whipped out my multimeter and the relays were all shorting each other. I’m still not sure why so I sliced them into individual relays with a terminal block and LED on each. Whilst slicing I did see little copper links between each relay. Goodness knows why but I went from this: