Employment – Part-time workers. The Employment Appeal Tribunal, in allowing the employer's appeal in part, held that, whilst the employment tribunal had correctly approached the question of whether a part-time employee of British Airways had been treated less favourably by the employer than a full-time comparator as regards a term of the contract, it had erred in law by holding, in effect, that statistical evidence produced by the parties was irrelevant to the question of justification, under reg 5(2)(b) of the Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000, SI 2000/1551.