Thanks for that, I’d read something that made it sound like I had an MCB so good to know what it actually is.
There’s power still getting to the oven as the hob still works, and when my previous oven stopped working, I got someone out to look at it and they were able to get it turned back on again. Regarding wiring it up, i’m certain I’ve done it correctly – Matched them up in the junction box where the power comes and splits off to the hob, and followed the guidance for attaching the cable at the oven end.