But it seems that "Johanna Ross, journalist based in Edinburgh, Scotland" basically paraphrased Murray's opinion, adding a few giveaways such as :

Furthermore, it's worth considering Navalny's popularity and reach within Russia. According to a recent poll by Levada, the opposition activist would gain around 2% of the vote in a presidential election was to be held, compared to 56% who would re-elect Vladimir Putin

The fact remains that Germany has given no actual evidence of poisoning, and refuses to do so when asked.

The fact remains that according to US Military study published in Cell human body degrades organophosphates (Novichok) so fast that if Navalnyi was poisoned in Omsk or in the plane, none would have been left in his body by the time he reached Charite. There would be metabolites, sure, but those would not indicate the actual poison with any certainty.

The fact remains that Russia has already done the preliminary investigation. They have interrogated Navalnyi's entourage, people on the plane, people on the airport and people he was in contact with in Tomsk. To turn that into a criminal investigation, they need Germany to give some, any, proof that a crime indeed has been done. For reasons unknown, Germany refuses to do this - saying either that it's up to OPCW to communicate with Russia (OPCW says they haven't been provided with any evidence either) or that they need Navalnyi's consent to provide any information.

As far as I'm aware, Navalnyi's anti-corruption foundation has not been very effective in fighting corruption. They have found some procedural errors in couple of public tenders, but that's about it. The big corruption cases, like the latest one in Vyborg, are found out by investigative media or actual police investigations. Independent media in Russia calls Navalnyi a "blogger", because that's pretty much what he does with any effect.

Navalnyi, at best, is a nuisance for some of the oligarchs. That's why recently, when Navalnyi's foundation was ordered to pay huge damages to the city of Moscow (foundation made provably false claims about the quality of school meals), man providing those meals, Prigoshin, bought the damages claim from Moscow, and now can shut down Navalnyi's operation at will. Why go trough that trouble and then try to off the man?

The very fact that Navalnyi was allowed to leave Russia while borders are closed to regular people, while still on parole (for embezzlement) and under investigation (for money laundering) has convinced many Russians that he is actually either FSB or has powerful friends among those he claims to fight.

Considering that his supporters finally managed to get a couple of seats in a few regional councils this week, he must be royally pissed off his wife arranged him out of the country without chance to return in the foreseeable future. BND will not let him go while they can use him to prevent Merkel moving away from trans-Atlantic binds.