Hilariously he's talking about Londinium, a city founded and administrated by non native non British people as part of a foreign beachhead of control by a non British empire. "Native Britains" were excluded as residents or in tiny numbers for four centuries.

London has always been a hive of culture, he's just pining for the nostalgic times he wore onions on his belt and was blind to the depth of culture in London.

There have been Russians in London since before the USSR, not that DHH would have noticed unless they spoke given so few of those Russian were Asiatic or from the steppes.

His point was that he has now finally noticed changes and that he's had his eyes opened by the likes of Stephen Christopher Yaxley-Lennon, Andrew McMaster, Paul Harris, Wayne King, and Tommy Robinson.