i'm not sure if it is a requirement, but i thought that i might have been asked proof of relationship and i didn't want to forget anything! this is what i brought with me, i hope it helps...
1. application that i downloaded from the internet
2. marriage certificate (the official one)
3. both of our visas and birth certificates
4. a letter written by Ian asking to allow my entry clearance, and a brief description of how we met and how much he misses me...
5. a letter written by myself explaining how we met in a little more detail (where we went and what we did stuff like that)
6. accomodation letter (from his dad, explaining we will be living there for as long as it takes) along with a utility bill or lease/mortgage
7. letter from Ian's work stating he is in good standing, and how long he has worked there
8. bank statements (now i didn't have the past 3 months which is what i thought was required...i only had 1 month, and they didn't say a word about it)
9. pictures, emails, and phone bills
10. my resume (C.V.), and portfolio...showing how serious i am on finding a job...that helped a lot!
hope that helped
oh, i forgot to mention that i made copies of everything except for the pictures, before i got there