Check the definition of being unable to work
Policies can assess incapacity in different ways. What counts as being unable to do your work, and what evidence is needed, should be clear before you rely on the cover. Your occupation, health and the way you earn an income can influence the terms offered. Self-employed people need to understand how their earnings would be assessed for a claim.
Build the plan around what would actually continue during an absence: sick pay, household income, savings and existing insurance. Review it if your work or earnings change. Income protection is not a savings account, and it does not pay simply because work is unavailable. Redundancy or unemployment needs separate consideration unless the policy explicitly includes it.