The Brits are accusing the Russians of poisoning one of their double agents.
Russia then ignored a deadline for them to explain how they used a nerve agent against their spy/agent.
So the Brits then expelled 23 Russian diplomats, and tensions are at a high not seen since the end of the cold war.
But, I’m probably not the best person to explain all this. Here is a much better explanation:
UK: You used chemical weapons on our soil, we have evidence, you've been caught.
Russia: No u
— AlternateHistoryHub (@AltHistoryHub) March 14, 2018
Sums it up pretty nicely.
Here’s hoping to a peaceful, diplomatic solution to all of this.