Next to speak is the SNP's Westminster leader, Ian Blackford, who says on days like this, he thinks of those who made sacrifices over the Covid pandemic. But then he moves to his argument... "At the very heart of this scandal there is one thing that needs to be said and heard - the prime minister of the United Kingdom is a liar," he says. Blackford says the PM denied parties took place when he spoke to the Commons in December and "hid behind his staff". "But we know the truth," he adds. "The truth contains no ifs, no buts......