Massive Post!!!!
I understand this thread has gone quiet, but I thought having delved into this topic purely coincidentally and in a nostalgic (adopted as I'm too young to ever have known the era personally) and slightly vexed frame of mind having been trawling through the back issues of railway mags and diverse and long since redundant BR publications on the bottom tier of my crammed bookcase (really need to tidy that up...) next to my other half's mass of nursing journals, I'd contribute nevertheless, having just uncovered my barely read copy of 'Beeching: the inside track'. Now I'm no keen fan of steam, not even those celebrity locomotives still around in preservation, save for having the utmost respect for their presence at the core of the railways for such a long tenancy as the prime movers of the nations economy and continuing to drive the country in spite of the move to electrification which began to usurp some of their earlier haunts prior to the launch of 'dieselisation' in the late fifties and sixties.
To me the twilight of steam is an evocative period, the transition from the time tested to the new and vastly different, and from local lifeline to nationally profitable (still don't understand that concept, never will)
However back to talking in a modelling sense and going off previous posts on this thread I would agree it is a chance for a veritable goldmine of diversity in both rolling stock composition, livery and traction power, one which I would certainly consider a stab at representing purely for the whole host of prototypical oddities that you'd be able to throw out there! That said, it will not nor will it ever appeal to my elder generations, nor those whose interests were fostered by memories of their own parents/ grandparents and what they remember simply because of the overall sadness and dismay that enveloped the era and has largely still held sway in influencing the mindset of those of us (self inclusive) who discuss it , with the loss of the familiar from engine shape, whistle, coaling tower or the unmistakeable plume of white steam trailing behind a flat out 9F or similar workhorse steam engine of the era! And that's not to mention the similar sorry decline of the primarily localised rail network and the ripping up of some of the oldest branches extant in the country, and the relegation of some major routes as well (the track removals on the former Midland route along the Aire valley and the loss of the Thames-Clyde expresses etc.)
That said, it was an inevitability, certainly, as has and will be seen many times over again in the future.
Whilst the wastefulness abundant in this period of turmoil and strife (certainly for the 'boiler watchers' who took a distinctly abhorrent view to the new era being ushered in) in terms of the decimation of perfectly sound and able steam locomotion in such a short period of time, without clear and concise prior bedding in of the new diesels and next to no logitudinal experience in their practical, everyday, revenue based utilisation and application anywhere beyond the manufacturers own guidelines and the board's own trial results and guidance publications is symptomatic of the wider notion that we must strive to keep up with the world we live in, often pressured by other countries and the global scene we desperately seek to acquiesce post Suez '57!
To clarify and use some analogies from other instances of a quasi-Quantum Leap in technological progress, the Comet airliners were such a huge jump forward and were touted as Britain leading the way to the future of the world's connectivity and ushering in jet travel, however it became painfully apparent that not enough, it has to be said, was known nor was time or money invested properly in learning about the pressurisation/ depressurisation process and its practical application to the materials of construction at the time, thus they entered service with the carrier's blissfully unaware that every time the cabin pressurised and depressurised it caused massive stress on the airframe so that when they began to split open in mid air and sadly cost lives it made the whole world pay attention to the need to invest in the proper study of new technology prior to its application so widely (the Comets being omnipresent and nigh on monopolising jet airliner fleets for a time) Another example, Windscale (Sellafield) and the reactor fire which was a consequence of shaving the cooling fins of the aluminium pods inserted into the core to produce more plutonium faster resulting in a radioactive fire which (if not admitted to by the powers that were) caused a huge outcry and public scandal over the consequences for the locals and their natural environment and later the secret reasons behind the radioactive fallout that was or wasn't deposited over the Cumbrian countryside as a result, and that came about all because we were so desperate to gain a seat at the Nuclear table with our American cousins who had slammed the book of knowledge closed in the wake of the 'red purge' and the Soviet bomb project unwittingly being sold or even gifted to them by the American secret development team themselves, another example of a rush to build bigger and faster without thought of the consequences!
So I sympathise with the view that there were perfectly sound pieces of equipment condemned well before their time, indeed including some of the groundbreaking pilot scheme diesels that fell foul of the cutters torch before being wrung of every last drop of usability it was realistically speaking an inevitability in the politics and mindset of that generation.
But, for a modeller, it would be a distinctive era to model and one which is worthy of more attention I'd certainly agree!
As for infrastructure having read into the decisions at the time, such as the closure of the myriad of pick up freight locations in favour of centralised consolidation centres, such as truly purpose built locations like Tinsley which brought about the closure and rationalisation of many of the smaller goods yards and foundry sidings in Sheffield, some of which were still getting by in a time of huge economic and manufacturing output with Victorian era cranes and sheds designed to be served by horses, rather than motorised goods vehicles, it was again progress in sort of the right direction albeit unfortunately and probably in a sly fashion tied to the ongoing and profitable expansion of the national road system, which just about comes full circle to the modern day, where every household near enough has a car or access to one, there are more lorries hauling from one end of the country to the other than ever before, the railway is a bad joke run by the Dutch and Germans (whose own networks and systems we largely rebuilt after the war!) at a cost to the 'customer' which goes up every year and yet still refuses to run anywhere near to the standard those countries would expect themselves, but still it is by and large staffed by some great people who put in all they can (in the 'coalface' jobs at least) only to be rebuffed by misguided management who focus on gaining customer loyalty (!!!) like you have a choice which company to travel with from Leeds to Kings Cross direct or which brand of crowded Pacer you get on in the morning, when they're all run by the same single bl'''y companies!
Only good thing to come out of the Post-Beeching/Marples/Fraser/Castle era was Freightliner, because it is still going strong and standardised containerisation does work as a global business model, so thanks Dr Beeching!
So, sorry but huge rant and post now over.
(Some of this stuff I have researched honest, but alas I've slept and re-alcoholated since I read up on some of it, so apologies for any inaccuracies!)
I'll get off my soapbox.
Paragon.
Edit to include beer disclaimer and correct auto correct typos (blooming technology grr!)