By the sound of it, this is a reviewable whole of life plan. It provides cover for the rest of your lives, but the premium is reviewable. Typically premium reviews occur after 10 years, each subsequent 5 years and when the older of you reaches 70, annually.
There may be additional benefits included on the policy apart from basic life assurance. For example, there may be specified serious illness cover, hospital cash etc. Ask your broker to give you details of what exactly is covered. Depending on the nature of your illness, you might possibly have a valid claim. You can also ask Canada Life to tell you what's covered - even if you don't know your policy number, they can look you up by your name and date of birth.
If you have developed a long-term illness since you took out the policy and your partner is suffering from depression, you might find it difficult to take out a replacement policy now.