"As a result she was able, as single parent to do her job and be at home to look after her child. She however suffered a financial penalty in working these shifts as these shifts were the ones that did not attract a bonus payment [an unsocial hours payment]."
"(i) such that the proportion of women who can comply with it is considerably smaller than the proportion of men who can comply with it, and
"(a) What was the relevant "requirement or condition" which was applied to [Ms Edwards]? (b) Could she comply with it? (c) If not, was it one which "a considerably smaller proportion of female train operators than male train operators could comply"? (d) If so, was it justifiable?"
"We are satisfied from the evidence that she was unable to comply with the condition that was imposed upon her. It is clear from the evidence that no reassurance was given to her, and we are not satisfied from the evidence that we heard that the swapping arrangements which would enable her to continue with her work would continue in the way that were [sic] satisfactory. As a single parent she was torn between the need to do her job and the need to care for her child and these new rostering arrangements in the new company plan did not satisfy her needs."
"9. The third requirement is whether it was a requirement or condition with which a considerably smaller proportion of female train operators could comply as compared with male train operators. We have heard from the evidence before us, and it was accepted by Mr Bean, that all the 2,023 male operators complied with this condition of the new rostering. We heard evidence from the Applicant that out of 21 female train operators she was the only one who positively complained that she could not comply with the new rostering arrangement. However, the Respondent's witnesses confirmed that there was a Mrs Quinlan who had also applied for the Single Parent Link arrangement when it was proposed but she had signed the contract and had worked for two or three weeks under the new rostering system. It was accepted that she was then moved because it was said that she had a bad back as she was pregnant and eventually she took a career break. She is apparently still employed by the Respondents but she was not called as a witness by either the Respondents or the Applicant and we can only conclude from the evidence that we heard that, out of the 21 female train operators, two of them did not continue with the new rostering a month after it came into operation. The Respondents have argued that the Applicant should have tried the new rostering arrangement to see if it could have worked out. However, an employee faced with a choice between working a new roster and if it did not prove satisfactory having to leave or being dismissed for breach of contract, and the alternative of an enhanced voluntary severance package, could reasonably not risk working the roster when they were quite clear in their own mind that they would not be able to do so for very long.
"We do not accept that the tribunal's conclusion [on justification] was perverse. We agree with Ms Edwards that it was for London Underground to satisfy the tribunal that the requirement was justifiable. That was an issue of fact and degree which cannot be disturbed on appeal if the tribunal directed themselves, as they did, to the correct test and came to a conclusion for which there was some evidence. There was evidence before the tribunal as to London Underground's proposal for a single parent link scheme. In our view, the tribunal were entitled to come to the conclusion on that evidence that it was feasible to cater for single parents or those with primary care of children who were only able to work social hours, without significant detriment to the objectives of London Underground to achieve savings. The Tribunal took account of the need of London Underground to make savings and found there was no significant detriment. In our view, there was no error of law in the tribunal's treatment of this issue."
"11. We then come to the question of justification.
"In my judgment 'justifiable' requires an objective balance between the discriminatory effect of the condition and the reasonable needs of the party who applies the condition."