Not just London!

There was a wave of immigration following the progroms against the Jews especially in the 1880s

"Those leaving the Russian Empire sailed from the ports on the Baltic coast, primarily Libau [now: Liepaja, Latvia], Königsberg [now: Kaliningrad] and Szczecin [Stettin, Poland].

Most dreamt of going to America, but those who could not afford the fare over the Atlantic Ocean took the short voyage to Denmark or Sweden, or further on to England, where either they would work hard trying to save money enough for the next part of the journey or subsequently choose to settle down and make their life.
For the majority of Russian emigrants whose planned destination was England it was often the case that they had the name and address of a friend or relative who would assist them on their arrival.

A report on Leeds in 1888, by the (UK) Select Committee on Immigration stated, "During the last twenty years there has been a steady influx of Polish-Russian Jews. The greater part come from the province of Kovno, and on starting, are often acquainted with but one word of English, 'LEEDS'."

Jews were attracted to this city by the rapidly expanding clothing industry where both wages and working conditions proved superior to those in London or Manchester."

The main community for Jews in Leeds was The Leyland; my ancestors eventually completed their diaspera over the Pennines but retained the name 'Leyland' (my maiden name) as a 'naturalized' family name.