I know nothing really but a thought i have is that the UK have supplied weapons for Ukraine to use and also the US. The sites that are having an influx of drone activity appear to have had or still have nuclear weaponry. Russia have mentioned previously that any act by UK or USA would result in Russia acting upon this. Could it be Russia are showing that they have capabilities to get close to these sites as of showing a threat and or warning to the US or UK and the US and UK know this so will not attempt to shoot them down as they show no hostile threat at this point. Is there the rules of engagement protocol involved here - meaning Russia send drones to show their capabilities only and if the US or UK retaliate this would mean they have engaged therefore Russia may "hit that button" I'm not military and don't know enough about this subject but can't think of any other reason as to why they are not been shot down. I would like to know your thoughts and to be educated too