"10 Within a very short space of time after her employment ended on 20 August, Mrs Roberts had spoken to the owner of a neighbouring salon known as Bumbles and had agreed to start work for him. She started on 1 September. It is clear that although originally it was on the basis of a 3 month trial either way, by the end of that week both parties were satisfied with each other and the employment was to all intents and purposes permanent. Or rather it would have been permanent but for a decision by Mrs Roberts that she wanted to learn to be a teacher of hairdressing. She would have had to pay the fee for the College course herself had she remained at Bumble, but she learned that if she entered the employment of a most prestigious salon in Birmingham known as Umberto's she would not have to pay a fee because they ran their own academy which gave its own teaching qualification. She applied for a job and was offered it. She left Bumbles in order to work for Umberto's but had a week of unemployment in between. In fact she was at Bumbles only a week. Whether there was a misunderstanding or whether she had been misled by Umberto's is merely by the by, but the grass on that side of fence was not as green as she had been led to believe that it would be. Within 6 weeks she was so disillusioned with the terms and conditions that she left Umberto's and took up self-employment as a mobile hairdresser visiting peoples homes."
"(1) Subject to the provisions of this section and sections 124 and 126, the amount of the compensatory award shall be such amount as the tribunal considers just and equitable in all the circumstances having regard to the loss sustained by the complainant in consequence of the dismissal in so far as that loss is attributable to action taken by the employer."
"11 The question for us is whether any loss after she left the employment of Bumbles "is attributable to action taken by the employer." In one sense it must be arguable that it is because she would not have been working for Bumbles and therefore would not have been in a position to leave Bumbles had it not been for the original dismissal. But it seems to us that, at the end of the day, that it is almost unarguable that any loss after her decision to leave Bumbles, was not loss attributable to action taken by the employer but loss attributable to action taken by her. The chain of causation is therefore broken. At Bumbles she had secured what seems to have been permanent employment which, (but for the question of commission to which we will turn in a moment,) would have remunerated her as well as her old employment. But because she thought she could do even better she decided to leave. She did not do better she incurred additional loss. But it can hardly be just and equitable that that loss should be laid at the door of the respondents as her decision to leave Bumbles had nothing whatever to do with them. Therefore, her compensation for loss of earnings is confined to the difference between the commission which she received at the respondents and the commission which she might have received at Bumbles, the basic salaries being identical. It is common ground that she received initially no commission from Bumbles. She suggests that she would not have begun to receive commission until the end of the 3 month trial. But that apparently was the arrangement that she had when she first started with the respondents. Because things went well, she started to receive commission at a much earlier date. The possibility must therefore exist that she would have received commission from Bumbles before the 3 month period elapsed. It seems to us, taking the broad brush approach that it is appropriate on these occasions, that the best way to resolve these imponderables is to say that, on balance, we are satisfied that for the 13 week period which had been originally designated as the trial period she would have received no commission, but thereafter the commission that she would receive from Bumbles would be equivalent to the commission which she had received from the respondents. Her loss of earnings therefore is£50 for the 13 weeks of the trial period which is£650 . ..."
"(4) In ascertaining the loss referred to in subsection (1) the tribunal shall apply the same rule concerning the duty of a person to mitigate his loss as applies to damages recoverable under the common law of England and Wales or (as the case may be) Scotland."