It is lawful for the Women’s Institute to provide educational opportunities only to women.
It is lawful for the RNIB to employ, or provide special facilities for, visually impaired people in preference to other disabled people.
A charitable instrument enabling the provision of benefits to black members of a community actually enables the benefits to be provided to all members of that community.
It is lawful for the Scout Association to require children joining the Scouts to promise to do their best to do their duty to God.
Race for Life, a women-only event which raises money for Cancer Research UK, is lawful.