Free Traffic Legal Advice

Those are average speed cameras not specific cameras for speeding at one place.
So while one might be at the entrance off the roundabout there will be another (s) further down the road to work out your average speed over the distance.

https://www.plymouthherald.co.uk/news/plymouth-news/plymouth-speed-camera-hands-out-9751445

Streetview ofthe camera/pole on the pavement
https://maps.app.goo.gl/nnetXrRKxAMwmsNp9

Ok I know it's the D.Mail, but here is the link.
The essence of the story is that it took so long for the driver to register for the app and pay that he was stuffed with a parking penalty - which he took to court and won having offered a reduced sum at mediation which was refused.

https://www.dailymail.co.uk/news/article-14286937/Man-wins-court-parking-fine-MINUTES-pay-charge.html

They are keeping data on someone which is outside the scope of normal household & personal activities - in this case running a business as a landlord as being the executor/personal representative, so I'd say yes GDPR(UK) does indeed apply to them.

Well I would have thought it was fairly simple "IF" they are two seperate locations

Suppose the the person was caught doing excess speed on the said C class rural road while the NIP/172 notice requested that the registered owner divulge the name of the driver on the "High Street" which is at another town some miles away.

The driver can truthfully reply that while they were on the roads driving at that point at no time were they on the High Street location/time stated on the 172 notice.  The last similar one we saw on here I recall was in Wales where the locations were way off by umpteen 10's of miles.  At that point I would have thought the Police would quietly drop it. 
I'm sure others on here can advise on the legality of the police instead then saying - oh yes, sorry that 172 notice was a load of rubbish - here is another one.

All of the old mainstream banks will let you pay in a cheque via their mobile apps - that being Barclays, Lloyds, Natwest and HSBC. No idea about the others.

DVLA are gradually setting up drivers user accounts. These hold your licence details and you can add your cars onto your account provided they are registered to your same address as the licence.  I guess eventually all this sort of thing will be done online with you registering your payment info and getting charged/refunds to it.
You can already with it set up email reminders about VED on your cars and choose to stop gettign the paper form sent to you.

Thanks. What makes a crossing legal?

You may only move across the stop line when the lights are on red if personally directed to do so by a police officer in uniform.

Where I live there are a set of traffic lights on a urban dual carriageway with no way around them for the emergency services. It is relativly common to see traffic stopped at the red lights with no intention of moving under any circumstances and behind them is a police, fire or ambulance vehicle with lights etc blaring and no one moves.....until they change to green.

Its perfectly legal to use the phone provided it is in a fixed cradle. It's the "hand held/phone in your hand" bit while driving that creates the offence.

That said, I'm sure there are some other catch-all legislation somewhere that would cover an offence if you were excessively interacting with the phone while it WAS in a cradle such to be driving without due care and attention to the road. The cradle must also not obscure your view of the road.

There are also exclusions for hand held use covering making emergency calls and for paying for something via the phone's NFC facility in a "drive through" type retail outlet.

Its their public shared folder they have put the pictures on no need to register