I had a look at the Amazon link fascia, it actually gives a further £6.50 or so discount when you click through. The only problem is the delivery time, as it seems to be sourced from the USA. 3 to 20 days for delivery, unless you pay a lot more
I also had a dig around and found this:
https://www.seicane.com/inch-android...-camera-s30701
which whilst not of the exact same model (is clearly an older android 6 version), if you scroll through, it does give useful information on how to install, including different car make harnesses, full wiring diagrams etc. and a lot of information besides. Pity I didn't see it before!
My unit is kind of installed now; the rear camera is wired through the car, and lights up on selecting reverse gear, but I still have to configure it on the unit as currently I don't see anything, plus of course find a suitable spot to mount it at the back of the tourer.
I'm not getting any sound on playing music from a memory stick, even though the unit can clearly see the songs, and indeed 'plays' them - but no sound! The IGO sat.nav works fine, though again I haven't as yet found out how to hear any instructions, and the bluetooth pairing to my phone works well. It will take me some time to work my way through all the features, there is an operating manual screen, but it's not that helpful.
TBH, the guy who did my installation messed up the front fascia somewhat, spilling superglue all over the front left hand plastic fascia, and the unit is not properly flush mounted either - there seems to be a lack of mounting options behind my dash... I expect when funds and time permits, I'll end up buying another fascia and tidying up the installation. As with all things in this world, you generally get what you pay for, and I struggled to find anywhere local to do the installation for me. You live and learn, and next time I will try to find a proper professional installer to get it right!
Any bright ideas on how to remove superglue gratefully received!