Angela Rayner was expressing an opinion using unparliamentary language.
Claudia Webbe was making a statement supported by the evidence of Dominic Cummings' own words.
Where's the libel?
That subtle admixture of the absurd and the surreally plausible...
The Government can't sue for libel. That's not the problem. It's accusing your opponents of killing people- would you say the French Government have killed people? "Evil Tories" is bad politics too. Much better to go for incompetence.