Hey Stewal, thanks for the input. I managed to sort the issue out thankfully! The PO had wired the brakes to come on with the fog light for some reason, so when I pressed the brakes, nothing happened as they were already illuminated. It was a weird choice, but it's fixed now
I actually ended up doing what you suggested and got some second-hand OEM bumper lights as I didn't want to faff around with someone else's wiring.