Yeah, why would we host dissidents from countries we almost at war with? Good for all of us the UK didn' host a buch of dissidents and governments in exile during WW2... Oh, wait, they did!
Oh UK did it 80 years ago? Well then Ivan, come right in. And bring everybody who is war-averse with you, we wouldn't want any harm coming upon them, would we? Feel free to organize yourself any way you see fit and if you don't like how we made your morning toast - just cry "Russophobia".