My partner of 13 years is a British citizen and I intend to apply for an unmarried partner visa. He was previously married abroad and the marriage has not been legally dissolved.

I read in the guidelines that, for those previous relationships that has not been legally dissolved, we only need to prove that we have been living together in a genuine and subsisting relationship from more than two years. Is this true? Do we not need to have his previous marriage legally dissolved?

Please help, thanks.