If your spouse is a British Citizen, or has an Ancestry Visa or Right to Abode in the UK, or is sponsored to work in the UK, then you are eligible to apply for a UK Spouse Entry Visa. This also entitles you to work in the UK and should be applied for and granted prior to entry into the UK.
You must show that you are married to a person present and settled in the United Kingdom or who is on the same occasion being admitted for settlement.
You will need to show that you intend to live permanently with the other as your spouse and that your marriage is subsisting.
You will need to show that there will be adequate accommodation for you and any dependents without recourse to public funds in accommodation, which you will own or occupy exclusively.
You will need to show that you will be able to maintain yourselves in the UK adequately without recourse to public funds.
