Herga and alanabit, Disraeli or his family somewhere along the line changed faith, though I don't know the circumstances. At any rate he was not a Jew by faith while PM. I hope it was not that he had to renounce Judaism in order to be PM - certainly there was no legal impediment to a Jew taking office.

Msybe if Howard gets the top job, he will do for Jews what Thatcher did for women.... Not a lot.