although it was fairly recent, the GWR HST refurbishment when they put leather seats in 1st Class was a massive step up
The initial (2006 - 2009) refurbishment introducing leather seats in 1st class was remarkably bland, and I always thought that it was a bit of a downgrade with the slippery seats and the loss of the reading lights. The flat colours, cold lighting and same paint as standard class didn't suggest a premium product, nor did the rather hard leather-covered seats in drab tones. Given that they began replacing it in 2014, it was rightly short-lived.
The GWR First Class refurbishment showed much more
ambition and
flair, with great attention to detail, from the practicalities of the self-dimming lights and 90-degree-rotated sockets to the softer layer of foam under the contrast stitching on the seats. It genuinely felt like a class-leading product and, most importantly, felt like it was designed by people who understood the difference between a bus, a plane and a train. It could not be bettered when laid up for dinner.
GWR's refurb of the sleeper was even more ambitious, and an even bigger step
mostly upwards. The lounge car is a remarkable conversion that changes a Mk3 into something really far from British Rail, with its (admittedly style-over-substance) 'cocktail bar' and a seat arrangement that breaks the usual grid. I'd argue that the sleeping compartments are cosier and come much closer to a 'hotel room' quality than Caledonian Sleeper's. Again, they are a huge transformation from the BR interior, with their 'starry sky' LED lighting, properly retracting upper bunk (at last!), clever folding ladder and tiny wardrobe that really shouldn't work but which actually cuts down the rattle of clothes on their hangers. If they hadn't swapped the bed ends round (I don't want to have my head by a bin or within splashing range of my fellow traveller when they use the basin, thank you) and they had kept the book/phone-nets by the beds and luggage shelf next to the basin, I'd have been unstinting in my praise.