The provided job description is fairly comprehensive and well-structured, but it can benefit from minor formatting improvements to enhance readability and clarity. I will remove unnecessary classes like 'col-narrow-left', 'col-narrow-right', and 'col-wide' that seem irrelevant for a plain text description, and will ensure consistent use of HTML tags. Here is the refined version:
This role has no guaranteed hours of work; hours can vary from week to week, and there may be weeks when no hours are offered.
*Salary is based on age range (16-20 £8.65) (21+ £11.50)