there is no definitive answer to this question, further medical information may be requested by a life assurance company in the format of a PMA ( private medical attendants report) which they send to your GP or a full medical examination with the Life Assurances Doctor. It all depends upon the health status, age, smoker/non smoker and BMI for each individual.
If you are in good health and have answered no to all the health questions, then you should get standard aceptance where no further medical information is required.