Can an employer change any policies and procedures within the organisation, without consulting with staff, as long as it is communicated to them afterwards?

A distinction exists between contractual terms of employment and policies/procedures relating to work practices that are not contractual in nature. While a policy/procedure (e.g. modernisation of workspaces, disciplinary policy, IT security policy) may be varied/amended by an employer unilaterally, a contractual term (e.g. pay, pension scheme, hours of work) may not be altered without an employee's consent as this could amount to a breach of contract. 

It is prudent for an employment contract to specifically state (where applicable) that certain policies or procedures do not form part of an employee's contractual terms (e.g. disciplinary policy, grievance policy, etc). The contract