Please, will you define "ARS"? We repeatedly keep asking for abbreviations and acronyms to be explained and we're still getting them.
To be helpful:
ARS is Automated Route Setting - it's a program that does a lot of signaller's route setting - effectively setting the points for trains to go the right way. It's a signaller's aid. Previously, signallers would have had to manually set all the points, whereas most modern signal boxes have a degree of automation, to allow the signaller to focus on solving problems. If you re-number the platforms, the system needs to be updated to send trains the right way. While you could (in theory) have an interface between the two which "translates" platform numbers for the benefits of the casual customer, all the systems are integrated, so this would need unpicking on a national scale in order to do this.
Thank you for the explanation. As you say, most helpful indeed!
"Clever monkeys with technology Barely out of the caves and the trees......"
I don't think 4 and 7 were passive provision. The idea of the Fenchurch shuttle was to satisfy the need for access to the south-eastern part of the City (a tidy step from Liverpool St), which pre-war was a thriving business district, particularly with shipping, tea and other commodity brokers, used to through trains. These were the LNER's first class ticket holders from places like Loughton and Shenfield/Hutton. What happened, of course, was that the Luftwaffe put pay to much of the business in that area so by 1949 there was little demand.
As I understand it, the trains that went to Fenchurch Street were the ones that served the loop from Leyton to Woodford to Hainault to Ilford. Trains ran from Fenchurch Street to Fenchurch Street, with some travelling clockwise around the loop and others travelling anti-clockwise around the loop.
The reason why the LNER planned to introduce a shuttle from Stratford was that the Central Line was taking over the Hainault loop!
Fenchurch was regarded in the 20s and early 30s as the "usual station" for Loughton, and there was certainly a lot of traffic, mostly first class, to serve the various tea and commodity merchants that worked in that area. Latterly, more trains from F St did run onto the loop, but of course, it was not difficult to change by waiting on the up platform at any station Woodford to Leyton if you wished