The Fiancé / Unmarried Partner visa UK, also known as the UK defacto visa, allows the fiancé and an unmarried partner to enter or remain in the UK on the basis that they are in a relationship with a person who is present and ‘settled in the UK’. ‘Settled in the UK’ means that you are ordinarily resident in the UK with no immigration restrictions on the length of your stay.
The Unmarried Partner visa applies to both heterosexual and same sex relationships provided that you can prove that your relationship is subsisting and has been in existence for two or more years.
If your application for an unmarried partner visa is successful you will be eligible to work in the UK as soon as the visa is granted
Duration of Stay: the unmarried partner visa will be initially issued for a period of 33 months (if applying from overseas) or 30 months if applying from within the UK. A further extension must be sought for an additional 30 months to take you to five years. Once you have spent a period of five years on a spouse probationary visa, you will be eligible to apply for Indefinite Leave to Remain in the UK provided that you are still married and living with your partner in the UK and can continue to meet the maintenance requirement as mentioned above.