不需要12个月啊,你自己到UKBA上看要求就好啦,那些律师其实还不如自己呢
Immigration time restrictions
You must be free from immigration time restrictions on the day you make your application. This often means having already gained settled status before you make your citizenship application. How and when you are eligible for settled status will depend on the immigration category you were in and successfully meeting its requirements for indefinite leave to enter or remain. For example spouses and civil partners of British citizens who must complete a 5 year probationary period under Appendix FM would generally have the opportunity to apply for naturalisation on this basis once they complete the 5 year period and obtain indefinite leave to remain provided they can also meet the other requirements of naturalisation at that time.
上面这段话来自UKBA,请看第一句,只需要在申请入籍的那天有永居就行了