Creating a Terms of Engagement for temporary self-employed workers is crucial for clarifying the expectations and responsibilities of both the worker and the employer. Such a document typically outlines the nature of the work, the duration of the contract, payment terms, confidentiality clauses, and compliance with relevant employment legislation. It's important to ensure that the terms are fair and transparent, providing protection and clarity for all parties involved. 

We would advise you to seek legal advice when drafting or customising such templates to ensure that they meet all legal requirements and adequately protect the interests of both parties.