Under the Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000, SI 2000/1551 (PTW Regs 2000), a part-time worker has the right not to be treated by his employer less favourably than the employer treats a comparable full-time worker: • as regards the terms of his contract; or • by being subjected to any other detriment by any act, or deliberate failure to act, of his employer The right not to be less favourably treated applies only if the treatment: • is on the ground that the worker is a part-time worker, and • is not objectively justified For further information, see our Practice Note: Part-time workers. Where the rate at which overtime is paid, or the threshold at which it begins to be paid, has a different effect on part-time workers as compared to full-timers, this will often open up the possibility of part-time workers