Don't forget that if you cannot get mortgage protection life assurance at all or for a "reasonable" premium then lenders can waive the normally mandatory requirement for it although they are not obliged to.
Apply to one Life Assurance Company and provide ALL relevant medical history.Be prepared to wait for policy due to company seeking medical reports and/or asking you to attend Company doctor for a medical.Dependant upon outcome you will be accepted,accepted with conditions,deferred or refused.If you are deferred/refused advise mortgage lender that you have 'death in service' and that may be sufficent to release the mortgage.You can then apply to other companies for life cover.Best of luck.What is the chance of getting mortgage life insurance following a brush with cancer about 18 months ago (all fine now)? Are there particular brokers that can deal with the difficult cases?