Hi, Aud!
Let me, Russian, write to you, Russian, in English lang. 🤣
Britannia really can be called Albion. And Britannia is an old name for the UK. So far Albion is a metaphorical name for the UK. It can be used in poems, for instance.
The thing is that FOGGY Albion is Russian expression. Yeah, the UK is a foggy country. There is even an expression "pea soup fog".
Pea soup fog (aka pea soup) is a very thick and often yellowish, greenish or blackish fog.
That's why we, Russian, often call the UK the Foggy Albion (also metaphorically). Nevertheless the British never use this expression referring to their country.
I learnt these facts in the book "Britain. The country and its people" by James O'Driscoll. You can find its free version on the Internet.