Public Health England has set up a helpline on 0800 169 2692 for women to call for advice.
Charities including Breast Cancer Care and Macmillan Cancer Support also have helplines and offer information about screening on their websites.
Although women aged over 70 are not automatically invited to screening, they are still eligible for check-ups if they want them.
Emma Greenwood, Cancer Research UK’s director of policy and public affairs, said: “If you suspect you have been directly affected by this or if you are over 50 and haven’t had a mammogram in the last three years and would like one, the NHS Choices website provides further information and the option to contact your local unit to book an appointment.”