Who says the Russians don't have a sense of humour? This is from their London embassy's Twitter feed and gives their official response to the UK government's decision to send troops to Estonia to deter the Russians from invading that country. The fact that Vlad Putin has no intention of invading anybody is presumably neither here nor there. As you can see, the Russians took that nonsense about as seriously as the rest of us.
Let's be honest: given the unholy row that is looming on the Brexit horizon, should we even be thinking about alienating Russia at the moment? The negotiations that will lead to our withdrawal from the European Union look set to be pretty hairy, so having good relations with Moscow might come in handy. Especially if we need to up the stakes and give Angela Merkel a bowel-loosening reminder of glorious days of yore: