hello Nicky - there may be some interchange of use, but generally for the U.K. those with handles are called custards, and those without are jellies.
Regret to say that you could be waiting several lifetime's for the answers as to maker and name of pattern - these things were made in their hordes from the middle of the C19 to approaching the middle of the C20. As to age, my opinion is that examples with machine acid etched designs such as yours are probably more likely to be somewhere in the region of 1890 - 1930, but difficult to be precise. If there is a ground/polished depression under the foot then possibly early in this period, and if a machine finished base then maybe later. There are really no books to assist with 99.9% of such things.
Again only my opinion, but I'd suggest that the 'cup shaped' example may well be for punch rather than custard/jelly.
But attractive and these machine acid etched items are interesting and certainly budget collectibles.

Others may of course have more informative ideas - let's see.