Equality refers to providing equal opportunities to everyone and protecting people from being discriminated against.
Diversity refers to recognising and respecting and valuing differences in people.
Inclusion refers to an individual's experience within his/her workplace and in society, and the extent to which he/she feels valued and included.
We would define equality as essentially being about fairness and ensuring that we all have the best possible chance to succeed in life, whatever our background or identity. Achieving equality of outcomes means you may have to do specific things for different groups to ensure that everyone has the opportunity for the same outcome.