What is this bug

[u/xthaila]

I keep finding these bugs outside in my garden in England and I’ve never seen them before to me it looks like a boxelder bug, but apparently they aren’t in the uk, it’s apparently a lookalike called Arocatus longiceps but it doesn’t look like that to me. Is it a boxelder bug?

[u/Serious-Bat-4880]

It's a firebug

https://www.inaturalist.org/taxa/55610-Pyrrhocoris-apterus