I regard re-enactment events as a reason to avoid the place where they are being held, and have never found assemblages of re-enactors where I've encountered them anything other than cringe making. Some (for example, the Napoleonic Wars period re-enactment that a university tutor worked with) are historically credible, others far less so. And any such event using BR era Mk1s, hauled by BR liveried locomotives, visiting stations decorated in pre-Grouping colours, is by definition not in the credible corner.That is your opinion of course, I don't think it's frivolous at all, it is after all a historical renactment, if you don't remember your history you will forget your future.
We came very close to losing the war several times, retreat from Dunkirk, Battle of Britain, Atlantic Convoy... We pulled through, it is right we should remember our victories, they are hard won, it is worrying that young people today don't know anything about it or have some vague idea, this can be blamed on the education system that places more empathisis on trendy subject with history replaced with left wing propaganda.
Such events helps to educate and bring history to life.
I've served and wore the uniform, I still visit such events, regimental museums, Normandy and Belgium, I take my neice and nephew to them to educate them as they are the future custodian of this country long after we have passed on.
The general tenor of railway events, based on the publicity, and post-event reports where I'm a member, is a ghastly concatenation of Allo Allo and mawkish remembrance, presenting a wholly ahistorical view of war and wartime life. The likes of Goering or the SS weren't to be joked about, but were a deadly threat to those living under their rule (even in Germany) - the idea of a recreation of such rule as a jolly day out is ghastly beyond belief.
I have no issue with remembering victories or defeats, and paying proper attention to the history. Near me, Belton House did excellent work to remember the Machine Gun Corps (it was home to their training camp in WWI), and a little further, there is the IBCC outside Lincoln. They do bring history to life, not just a sentimentalised and false version of it.
Whether or not GWSR were right to pull their event because of the Russian invasion of Ukraine, I don't know. But I sincerely hope it marks the beginning of the end of these ghastly, mawkish pieces of unhistorical kitsch.