Lessons of the second world war are at risk of being forgotten, or even rewritten | Sadiq Khan

As we mark the 80th anniversary of the start of the second world war, with liberal democracies again under siege, Britain should be leading the fight against extremism

Eighty years ago, the start of the second world war saw Nazi Germany invading Poland. Six years later, up to 85 million people were dead. I'm in Poland this weekend to commemorate the start of the bloodiest war in human history.

An entire generation of brave men and women around the globe sacrificed everything to defeat the singular evil of Nazism and fascism.