Each swirl of nostalgia overlooking old Saxon kingdom (4,6)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

EA (each) NOSTALGIA* (minus the O); the five original kingdoms of England are typically deemed to be: Northumbria, Mercia, Wessex, Kent and East Anglia. If you are interested, a very readable account of this period is given by Marc Morris in his 2021 book, The Anglo-Saxons