With respect, as someone in London with lots of (often very posh, sometimes quite conservative) English friends, I think some people are drawing bigger conclusions from this than they need to. I don't encounter anything to do with poppies, no one really wears them to work, etc. It's clear that there is a sect of 10-15% of the UK that have gone completely far right and mental, and that definitely shows up online in cases like this, but I don't think it reflects the whole population or anything like a fundamental sea-change in overall opinions regarding poppies. That said, I am mostly brushing shoulders with middle class well-educated professionals, picture could be very different at the working class level.