"7.—(1) Subject to any collective agreement for the time being standing approved under section 8, an agency worker shall, for the duration of his or her assignment with a hirer, be entitled to the same basic working and employment conditions as the basic working and employment conditions to which he or she would be entitled if he or she were employed by the hirer under a contract of employment to do work that is the same as, or similar to, the work that he or she is required to do during that assignment.".