The plane was old but had been overhauled a few months back and was the presidential plane. It explains the readiness of their pilots to obey the instructions of VIPs onboard despite their experience. It was for economic reasons since the aircraft is expensive to run, that they piled a fair number of well placed folks on that plane.
Polish newspapers haven’t speculated about conspiracy theories half as much (if at all) as foreign ones, so say our Polish colleagues. They’re bemused by the readiness of the British press to indulge in this.
Polish investigators have been given full access to the Russian investigations themselves and are participating in interviews with the Russians.
I think the Russians are quite mindful of the speculation so are bending over backwards all sugary & nice to accomodate the Poles.