Very interesting, thanks spitoon!
As part of my flying training I have 'requested an FIS' a few times. What is quite interesting from what you post is that there seems to be no real need to request it explicitally because if you establish two-way then you get it anyway. It seems that requesting and FIS is as much about what you
dont need, in that, "Requst FIS" = "Not planning to enter the ATZ, let alone land, just want the basics please".
So based also on the information you have provided...
Someville ground, G-ABCD, request flight information service.
and
Someville information, G-ABCD, request flight information service.
....would be complient calls but...
Someville radio, G-ABCD, request flight information service.
...would just make me look like a bit of an idiot
This makes me wonder what I would do if I was flying in close proximity to a a/g manned airfield and wanted to know if anyone else was opperating in the area. Perhaps something like....
Someville radio, G-ABCD, request traffic information
... would that be acceptable?
edit: Thanks for your answer to the second question also.