When it comes to the rear dash cam, I also wouldn't bother with those that have two lenses on one unit, it's a big faff to get it to point out of the rear window and actually capture much useful - so that leaves you with Nextbase's dual camera options. I'd probably opt for the Nextbase 322GW, although it's around £140 as a bundle with the rear camera: amzn.to/39kCuaq

The 322GW features GPS to record your speed and location, WiFi to watch and send the footage directly from your phone, and Intelligent Parking Mode. It also offers a number of more impressive features like Emergency SOS and Alexa voice assistance. Resolution is 1080p HD at 60fps with a 140-degree viewing angle. Truthfully, there aren't that many reputable brands that offer a good front and back camera. As for a good Micro SD (which isn't included), we'd suggest the SanDisk Class 10: amzn.to/39xlwVT

I'd also give Halfords a ring to ensure they can hardwire it although this shouldn't be an issue.