Mamie did explain before- British citizens in the EU, even those who spent their entire adult life there, did not apply for citizenship because there was just no need- at all. Being EU citizens was sufficient- and gave them all the rights and conditions they needed, so why should they have done? I did apply for British citizenship, because pre EU, and pre bilateral agreements - not being a UK citizen made life really difficult and complicated - in 1972.
Why is it not possible to understand the stress, difficulties and real fears of a third party who explains her situation clearly?
The good news is, that someone who is very knowledgeable read her post and was able to point out that there was a loophole, as her family had strong connections to UK and that should help solve some of the issues.
But do read her situation again - re proving financial independence and long wait for appointments re applying for naturalisation.
As said, this was just one illustration among 100s of 1000s in similar situations, worried sick about what will happen to them.
And yes, it is heartless not to care for your fellow citizens who are finding themselves in really difficult situations, and find their health, sleep, stress levels, really affected.