“Does the GPS in cars use the phone system”
Yes and no. It depends very much on the type of car and where you live. So in the UK my Volvo has a SIM and the GPS is linked to that to receive real time traffic data which is superimposed on the screen to show busy intersections etc. It also, like most GPS, will suggest routes etc. So I know that the SIM/phone receives data.
But Google Maps etc. “knows” about traffic issues because it receives data back from users. If I’m in a 30mph zone, but doing only 5mph, it can infer I’m in very slow moving traffic. The more feedback the better the routing etc.
You’re in the U.K.! Back in the moon landing days (we watched it at 2 a.m) we had a Rover 2000 company car. One day I was ready to call the Royal Auto Club beause it wouldn’t start. Fortunately I didcoveed I had put the key in the glove compartment lock!
My only experience with the RAC was when I locked myself out of the Rover. The RAC rescuer asked the lady of the house if she had a fish knife which he used to get in!! That was quite fascinating.
I miss the mincemeat tarts most. Altho the chocolate water whip (I think) bundles were very delicious. I brought 6 or 8 home for my mother-in-law when we returnd home. She had mentioned them. Embarrassed to say I ate them all—hopefully there were “only” 6. during the course of our return flight.
My older son and his wife went back to London a few years ago on ther way to Ireland. He said everything is changed, it’s not the same place. They didn’t get up to Highgate. He has no urge to ever go back