The major issue is that Jewish (sur)names were - for various reasons - often not a constant. Therefore I’ve played a bit with various versions of the couple’s surnames. The following is probably totally circumstantial, but it might still be food for thought …
In the April 1891 Census Abraham and Kate are already married and residing in 181 Wardour St, St James Westminster, London, England
The April 1911 census mentions that the couple has been married for 20 years, so their marriage would have taken place ca 1890/1, but did they marry in England or Poland?
In the first quarter of 1891 a Gitla SZTOKLAND marries in district Mile End. Could this be Kate?
Unfortunately there are 2 possible grooms: Morris ELLIN and Abram SZLADOWER (it is a guess without the MC)
The surname SZLADOWER seems to appear to the north west of Warsawa in places like Plock and Plonsk. And, in 1867 a Abram Dawid SLADOWER is born in PLONSK as the son of Lewek (a manufacturer) and Rojzy:
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSC1-SW6V?i=86 (#167). Just a coincidence or could he have been the same person as the 1891 groom?