20 Amp Combined RCD/MCB Circuit Breaker

Product seems well made, at least switch and test button work, not simulated a fault condition. However in the Amazon photo the 'N' terminal is on the left so it would replace the existing one fine but my one had the 'N' terminal on the right. This meant moving it to the right hand end of the rail, well OK, but then I found the Live terminal was about 5mm lower than all the other MCBs, and I have two different makes in use, so the copper bus bar did not line up. After some creative engineering I made it fit and currently all is well. So not the sooth fitting I expected for that price.