The Jews were expelled from England in 1290 by Edward I. This was one of the earliest expulsions of the Jews in Europe, and Jews and weren't legally allowed to live in England again until the 1660s under Cromwell. Between those two periods I read there was essentially no Jewish community in England at all except for an isolated group in Oxford which disappeared in the middle of the 14th century. There were Jewish individuals, but no Jewish community.
About 15 or 16 thousand people were dispossessed and removed by the Edict of Expulsion. The kingdom got a tidy sum of money out of this.
I don't think a PoD within a few years of this time is plausible for political and economic reasons. This is, as I understand it, the culmination of an ongoing period of persecution where the Jews are progressively robbed of all their money and are worth less to tax as a result. Perhaps we would need a long-term thing where England is maybe cut off from the Crusades and religious fervour is weaker. An example of the kind of thing I am imagining is that the kings of England go for a long-term policy of heavy taxation of the Jews and exploit usury to gain an economic advantage.
If we can get a PoD, could many Sephardic Jews, fleeing the aftermath of the Reconquista, or alt-Reconquista, arrive in England? How, more generally, could there be a very many more Jews in England?