These are usually a short term policy for 12 months and you can cover Accident, Sickness & Unemployment cover for your mortgage and mortgage related bills i.e house insurance premiums.
Long term Income Protection is a policy you can have to cover your income should you be unable to work due to Accident & Sickness. These policies start from 5 years to long term of up to your 70th birthday with some providers. You can have level term income or inflation based income protection. You can usually cover up to 60% of your salary.