Sorry not to have responded earlier, I must have missed your posting. But, I'm afraid I've have searched through the whole of Ilkeston and found no Worsnop's at all.
Sorry I haven't got better news. If you have any other possible Derbyshire area's I'll have another go. Do you know where Rebecca as born, for instance, as her birthdate is the closest to 1841?
I think I may have now found James in Shelf, near Bradford and Elizabeth and Rebecca in Sheffield but still no sign of Abraham. It seems they were spread out for the 1841 census! Abraham was a methodist minister and as such did spend much of his life time travelling. I am just hoping that he wasnt missed out of the census altogether, say perhaps because he was on the road or something!
I will keep looking but will just have to broaden my search.