DIoB is an affiliate of Institute of Directors (IoD).

The IoD is a non party-political business organisation founded by Royal Charter in 1903, currently with around 55,000 members.
The IoD has always championed the entrepreneur and seeks to provide an environment conducive to business success. For any company to prosper, directors will be continually engaged in making decisions involving innovation, risk and investment. Entrepreneurial activity needs to take place within a solid, strategic framework.
Informed decisions depend upon knowledge and experience. The IoD has always been dedicated to providing directors with the information and advice they require to help their business succeed.