I’ve seen a naked eye observation of the nova, reported on the VSnet list. Filipp Romanov observing from Nakhodka, Russia (nr Vladivostok, 42degN) had it at 5.1 vis last night (2021 05 10.75). “It was easily seen next to the star 4 Cas against the background of the Milky Way”, Romanov notes.
This is the first NE obs report I’ve seen. It will be interesting to hear if a BAA member gets to see it with their NE, although its position is quite challenge, along with bright skies.