Today’s Washington Post WorldView newsletter throws more light, a lot of shade, and a lot more confusion onto the ban I linked to last night, on taking laptops and tablets in hand luggage from certain airports.

First, I didn’t realise that the list of affected airports is different between the UK and the US. Second, for the US, it is just a small set of airports, not all airports in the affected countries. The UK takes the broader approach — but for a different set of countries.

The most interesting point to my mind is that this may all be Trump trying to help American businesses:

When pressed by reporters, officials in both countries said the measures were not a response to a specific threat, but rather the result of intelligence assessments that concluded groups like the Islamic State and al-Qaeda are seeking new methods to sow terror in the skies, possibly through hidden bombs in electronic equipment.

And later:

Farrell and Newman suggested Tuesday’s order is an example of the Trump administration “weaponizing interdependence” — using its leverage in a world where American airports are key “nodes” in global air travel to weaken competitors. My colleague Max Bearak detailed how this could be a part of Trump’s wider protectionist agenda. In February, President Trump met with executives of U.S. airlines and pledged that he would help them compete against foreign carriers that receive subsidies from their home governments.

“A lot of that competition is subsidized by governments, big league,” said Trump at that meeting. “I’ve heard that complaint from different people in this room. Probably about one hour after I got elected, I was inundated with calls from your industry and many other industries, because it’s a very unfair situation.”

So unfair. But if that’s what’s behind it, what the hell does our glorious leader get out of going along with a slightly modified version of it? It’s certainly not to protect British airlines, as they (unlike American airlines) are affected by the ban. Maybe my “lapdog” dig was exactly right. For years Tony Blair was referred too as George W Bush’s poodle. Maybe Theresa May is adopting the same role for Trump. Which is a horrifying thought.

Another WaPo article contradicts all that, though, suggesting that the whole thing might be based on some credible concerns:

The U.S. restrictions were prompted by a growing concern within the government that terrorists who have long sought to develop hard-to-detect bombs hidden inside electronic devices may have put renewed effort into that work, according to people familiar with the matter

But it asks the question and fails to get a satisfactory answer, “Why not ban all electronics on flights, then?”

People familiar with the discussions said the restrictions were designed to defeat the particular type of threat that is of greatest concern: the possibility that terrorists could smuggle explosives inside electronics and manually detonate them once on a plane.

Even if that makes sense (after all, its not like a computer in the hold is (or could hide) some kind of timing device): why just from a strange subset of airports, even in the countries of concern?

And if it’s all based on a real threat, why the US/UK difference?

They also raise the real concern that journalists, activists, and just ordinary citizens, will be separated from their personal information, leaving it under the control of unknown people.

Buckle up, folks, this ride is only going to get stranger and more unpleasant.