I indicated that a bit in my post, and also in various other posts, but a good long explanation would be an article worthy of the NYT or closer by, a good BBC documentary. A good one.
You have to describe the impact of the neglect by the government in flanking and developing policies and the wrong directions by politicians messaging towards small and big company owners, by statements and policies.
Thanks for that attempt of an explanation. Good analyses are scarce and it is all too easy to lament the loss of outdated manufacturing jobs and the articles you linked are also not able to completely avoid that. They point to Germany and say that the Germans have kept their manufacturing sector. Yes, they did, but they didn't keep the manufacturing jobs.
Pretty much anybody I know who actually worked at an assembly line in the past has lost that job by now. I have met and know many people who work for BMW, but none of them ever touch a car that is going to be sold to a customer. Part of that is certainly because the educational level of my acquaintances tends to above average, but part of that is also due to the reason that there are not many people at BMW who actually build cars. The assembly lines are highly automated and most of the work is done by robots. There is someone, who builds those robots, of course, but again the robot company has many more people who design, develop, program, and sell the robot. So the shift from strict manufacturing jobs to "service" jobs, which never actually touch the finished product was accurately taking into account. The fallacy was more that you could then go on to just sell services instead of manufactured goods.
Goods are much easier to sell than services. You can specify the product and then send it cheaply around the world. With services this is much harder, because it is not as easy to specify what exactly the service should be and you need to communicate much more, often over language barriers. This means that a service tends to be more efficient, the more tightly integrated it is and selling a service from half the world away is going to be difficult.
Going a bit more on topic: I wonder how much of the decline of UK manufacturing is related to the refusal of the UK to properly engage with the EU. Some of the EU countries and especially Germany have managed to shape Europe into a huge domestic market and the UK could have done so as well. Part of the reason why they didn't may be that they lacked the industrial base to do so, but I think the apparent inability to understand European politics have certainly contributed. The reason the Brexit deal is so bad for the UK is that the UK government took way to long to understand the EU position (and to some extent still doesn't).
I think the Brexit proponents on the Tory side as well as on the Labour side are stuck in the past: The Troy side thinks than the UK on its own can be a major power on the global scale, when this hasn't been true since the Empire dissolved. The Labour side seems to think that the EU somehow prevents them to make another failed attempt at getting the good old manufacturing jobs back.