Quick summary of options (in increasing order of cost) would be: -
(1) Term Assurance - pays out a lump sum in the event of his death within a specified term. Pays nothing if he lives to the end of the term. Fixed cost.
(2) Reviewable whole of life. Avoid like the plague. Purports to offer life assurance cover for the rest of his life, but premiums reviewed after 10 years, each subsequent five years and when he reaches 70, annually.
(3) Guaranteed whole of life. Pays out a fixed sum whenever he dies. Guaranteed premiums - will not increase.
As you're getting married, I'd say one policy should be sufficient (and cheaper than two). Any life assurance broker should be able to discuss your requirements and come up with a suitable solution.