Part time cabin crew less favourably treated than full time comparator

Regulation 5 of the Part-Time Workers [1] (Prevention of Less Favourable) Treatment Regulations 2000 ("the PTW Regulations") provides:-

"5.—(1) 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— 

(a) as regards the terms of his contract; or