How is London’s Grenfell Tower Still Standing?

‘Yesterday’s news about the Grenfell Tower in London going up in flames has me a bit confused.
On September 11th, 2001 the Twin Towers in New York City both sustained a great amount of fire damage and each building collapsed at near free fall speed. They disintegrated into dust!

It is interesting how this did not happen with Grenfell Tower in London despite the entire structure being engulfed in flames.
I guess the laws of physics were just suspended yesterday, because any time a building catches fire it should collapse at free fall speed. The Twin Towers proved this!’
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