Examples
A Catholic seminary can restrict places for students to those of the Catholic faith. This would not be unlawful religion or belief discrimination.
A Church refuses to let out its hall for a Gay Pride celebration as it considers that it would conflict with the strongly held religious convictions of a significant number of its followers. This would not be unlawful sexual orientation discrimination.
A religious organisation which has a contract with a local authority to provide meals to elderly and other vulnerable people within the community on behalf of the local authority cannot discriminate because of sexual orientation.