Thanks for the interest and help, JustinL, especially with sorting the names: I knew nothing of the system of naming. As for "Ukraine" that was/is pure speculation as I assume he came from the Pale of Settlements and Ukraine was a guess only (hence the query mark).
Emanuel's son was clear that his father came from Russia: census records show: 1861 -- Poland; 1871 -- Russia; 1881 -- Russia; 1891 -- Russia. Census records for Pauline show: 1861 Selina from Germany; 1871 Helena from Germany; 1881 Selina from Germany; 1891 Pauline from Germany.
I have looked at Alien arrivals on Ancestry.co.uk but can find no sign of arrivals of Pauline or Emmanuel, except I did find:
MENDEL Abraham, a Taylor from Prussia, who arrived at Hull on 13 August 1850 on the ship "Harmonia" from Hamburg. But that is not at all conclusive.
And, again, thanks for the information regarding the qualifications to marry in a synagogue. All news to me.
In regard to Pauline's passport, it appears to have been issued initially in 1850 and then re-validated in May 1857 (1850 und sieben). Again, speculation makes me wonder if she was supposed to accompany Emmanuel in 1850 but her passage was put on hold for another seven years ?
Again, in the far distant grey cells of my mind, there is a "feeling" that I was told many, many years ago that Pauline came to England as part of a family of six. That doesn't seem to have been the case, or at least I have found no trace of them, and could be my mind playing tricks.
Perhaps this is an unbreakable brick wall, though I will keep scratching away, and any help will be much appreciated.
Regards
francoso