Do my employer's handbook and staff rules form part of my conditions of employment?

If your employer specifically states in the contract of employment, or the written statement of particulars of employment, that the rules apply, then that is an express term of employment and the rules and content of the handbook form contractual terms.

This means that the employer, as well as the employee, is required to observe the rules; for example, in implementing an equal opportunities policy or grievance and disciplinary proceedings.