Hi, I did a it of research here. Latter and former are adjectives but not possessive adjectives. Possessive adjectives are hers, his, theirs, ours, etc. Former or latter are preceeding some know entity. In the example given, the cinemas. The latter cinema's names are 'The Great Theatre of Whatever' and 'The Royal Theatre'. Former's and latter's may be in use, but it is morphed or slang. I hope this helps, Stephen

I think yes. Well, the plural form of these nouns is the same as their singular form, so why should possesive case forms be any different? I guess it complies with the same grammar rules as other nouns. Let's make up an example: Three cinemas and two theatres were built in 1998. The latter's names are 'The Great Theatre of Whatever' and 'The Royal Theatre'.