I can 100% reassure you and other customers that the rear cam for the 512GW does not experience this problem of the image being flipped. I, of course don't know what is/isn't supposed to happen with Halfords rear cam model, I definitely recommend contacting their Technical Support if you feel something isn't right.
We did have a delay when ensuring the Rear Cam causes as little interference as possible within the vehicle and its now been achieved.
For this I am of course extremely sorry, I know I can say this on behalf of Nextbase for the delays that have been experienced too.
Now I have the good news (I wanted to ensure it's 100% correct before posting): the product is landing in our distribution centre 15th May, our Technical Support Centre will then soon after receive stock to enable us to distribute to the customers on my (ever growing) list.
I'll subsequently be contacting everyone who has asked for a Rear Cam or to be notified of its release over the next fortnight.
At the risk of sounding like an echo, could I also be added to the mailing list?! With a couple of the close calls I've had with tailgaters and bad drivers recently, I'm eagerly anticipating the rear camera!!