Immigration from Poland to England #unitedkingdom

Debbie Lifshitz

I am currently researching a family that appears on the 1911 census. They appear neither on the 1901 census nor on the 1891 census. 
They are listed variably as Russian or Polish, so I take it that they came from Russian occupied Poland. 
I have no idea where they came from within that territory. Nor do I have a clear indication of when they arrived in England. 
What are the best tools for researching immigration to England? Are there ship manifests in the UK, like the ones available in the US? Was there a naturalization process? Was there a legal process for anglicizing names or spellings?
Any help in breaking through this brick wall would be appreciated!
Debbie Lifschitz

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