The article claims

Someone proposes to follow what Americans have already tried: 100 ml containers up to a maximum of 500 ml in little transparent bags.

I take that as a suggestion that the nonsense originated in the US.

As for the feasibility of using liquid explosives...

The Register: Mass murder in the skies: was the plot feasible?

Binary liquid explosives are a sexy staple of Hollywood thrillers. It would be tedious to enumerate the movie terrorists who've employed relatively harmless liquids that, when mixed, immediately rain destruction upon an innocent populace, like the seven angels of God's wrath pouring out their bowls full of pestilence and pain.

...

Now we have news of the recent, supposedly real-world, terrorist plot to destroy commercial airplanes by smuggling onboard the benign precursors to a deadly explosive, and mixing up a batch of liquid death in the lavatories. So, The Register has got to ask, were these guys for real, or have they, and the counterterrorist officials supposedly protecting us, been watching too many action movies?

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So the fabled binary liquid explosive - that is, the sudden mixing of hydrogen peroxide and acetone with sulfuric acid to create a plane-killing explosion, is out of the question. Meanwhile, making TATP ahead of time carries a risk that the mission will fail due to premature detonation, although it is the only plausible approach.

Oye, vatos, dees English sink todos mi ships, chinga sus madres, so escuche: el fleet es ahora refloated, OK? — The War Nerd