More likely that there is a shortage of journalists who actually understand what they are writing about; rather like when the rule book was given to an organisation to simplify the English used and got ‘ a signal further beyond’ (or something like that) for a Distant signal!
In the same way refurbished SOV became ODA. However the SJA joining the steel categories was a sectorisation thing as the prototype two scrap carriers were MFA.
Working at height regulations have been a major change affecting signals recently as most recent build and replacement are more akin to street lights and can be laid flat for maintenance ad no don’t have ladders!
The height of the screens tended to be as low as possible to avoid unnecessary breakage of coal as the size of the coal affects the sale price plus avoid refunds/compensation to cus.
Condensed milk in tins was common in homes and no doubt larger cans for commercial bakers, Libby's, McNeil and Purvis had empty tins delivered to their factory in the specially built lot of 100 diagram 1/214 end door vans.
Most would be delivered by rail to the customer from works or hirer, Standard Wagon hired many ex BR owned wagons and subsequently hired them to industry with photo’s shotthem being delivered and then there were also wagons returning off hire or between locations.
Built for the conveyance of Sewage Sludge from the sewage works to where it was tipped, these being worked over the BR mainline between the two! There were also some built by Hudson but non of these survive.