If you are beginning to fill the uk spouse visa application from outside the UK, you need to complete the form called VAF4A. If you are applying from the UK, you have two choices. To apply online or by post. You can also apply through a premium service centre.
Documents needed are:
UK visa application form
Valid and previous passport
2 passport-size colour photo
Proof of english language
Certificate of the criminal records
Proof of the relationship
Full name, date of birth, parents date of birth and nationality (if from outside UK)
Proof of the financial means
Details of any previous immigration applications
Proof of the accommodation and paid spouse visa fees
