For more information-

http://www.nhs.uk/conditions/breast-cancer-screening/Pages/Introduction.aspx
​
https://www.gov.uk/topic/population-screening-programmes/breast

​https://www.breastcancercare.org.uk/information-support/have-i-got-breast-cancer/signs-symptoms-breast-cancer/looking-after-your-breasts/breast-screening

Advantages and disadvantages of breast screening-

​​http://www.nhs.uk/Conditions/breast-cancer-screening/Pages/why-its-offered.aspx