[alva]

> Is it fish caught in that same day like you can get in any Greek taverna in the Cyclades?

Yes

>Or frozen fish brought in from half a continent away?

You can get that too.

The negative response you are getting from users is because you are completely wrong about inability to get high quality, same day picked/slaughtered/fished food in London.

edit: in regard to frozen fish, I trust that the Japanese (who regularly freeze the absolutely highest grade Tuna during transit) know what they are doing.