Examine the mirror..published at 12:18 Greenwich Mean Time 31 January 2018
Prime Minister's Questions
House of Commons
Parliament
Emily Thornberry follows up by calling for a "logical explanation" for not lowering the voting age to 16.
She says 16-year-olds are free to leave home, can join the armed forces, pay taxes and are "free of parental control".
David Lidington replies that the last Labour government raised the age for buying cigarettes, buying knives and using a sunbed.
"If she wants a lesson in inconsistency, she might want to examine the mirror", he adds.