inspite that i got the number we still went to jobcenter on the said appointment date (which is in nottingham) and funny i wasn't on their list for interview....the man whom we talked to said normally when a person is on spouse visa they dont called them for interview anymore since they are centralize now and sometimes it is very inconvenient for some who lives far away from their center..they just required me to send them my passport details (xerox copy) and spouse visa stamp (xerox copy as well)...goodluck to you.