I eat plenty of veggie and vegan food. And might occasionally pop in for a veggie or vegan bite at the Railway- I have happily gone to veggie or vegan restaurants in the past, and my OH is veggie.
But for me at least, Sunday roast is the most important and enjoyable food experience I expect to have in a pub, and most food I consume in pubs are Sunday roasts. So yes, as far as the sacred Sunday roast goes, The Railway is no longer an option. I suspect that will be the same for loads of others too.
Frankly, if this was the only pub in the area, it would feel like a proper cunt's trick. But as there are other pubs that still serve Sunday roasts in the locality, so it's not the end of the world.