“11.5.10. … I accept the claimants account that they had deliberately kept the new business at arms length and were therefore not fully aware of the details of the nature of the business. 11.5.11. However I am of the view they knew of the advertisements and would therefore have concluded that there was to be competition to the respondent. 11.5.12. I have heard no evidence to allow me to conclude they became aware of the advertisements before their resignations.” 27. From this it is apparent that the Judge thought that until advertisements were placed by the new company, the Claimants did not know that it was to be in meaningful competition with the Respondent. He had no evidence to think that the Claimants actually saw those advertisements before they resigned. Therefore he concluded that there was no proof that they had broken their duties of loyalty. Despite his initial scepticism, therefore, he took the view that they did not know enough. His reference to “arms length” was a reference to them keeping themselves out of the scope of any knowledge which might have placed them in such an embarrassing position. That is plain from viewing paragraph 11 as a whole. 28. Accordingly I am satisfied that the Tribunal, as a matter of fact, came to the conclusion that, for the first period, the Claimants did not have the knowledge which would place them in breach of the principle expressed in Midland Tool taken at its widest. It follows that the first ground insofar as it rests upon that (and it rests, it seems to me, upon nothing else) must fail. 29. There is no complaint about the Tribunal’s approach in respect of the second period, nor is the third relevant. The second aspect of this point, therefore, is therefore unnecessary for me to determine. If it had been necessary to determine, I would have come to the view, echoing that which is said at paragraph 91 in the Judgment of Hart J, that the extent of the duty to inform as a director will depend upon the circumstances of each case. 30. The duty to inform the company of any activity, actual or threatened, which might damage their interests cannot be taken so far as, for instance, to oblige a director who may read of some gossip in the newspaper as to a potential competitor’s plans to tell the board that which he has picked up. All must depend upon the particular circumstances. Here the duty, if it existed, was plainly higher than merely reading the press, for both the Claimants were involved even if they did not fully know of the details, in plans to set up a business, which could, though they did not know, possibly have come into a position of conflict with South Wales. 31. It seems to me that the Tribunal directed itself appropriately in respect of the law. It thought that was the law it was applying. Its findings of fact do not suggest it did otherwise. If it had been necessary for me to do so, I would have accepted Mr Kember’s legal argument as well as his factual one in response to this ground of appeal. Polkey 32. Mr Racey makes the separate and distinct point that the Tribunal, on the one hand, was suggesting Mr Everett was guilty of a fundamental breach of contract for which he could have been summarily dismissed, but on the other saying that it simply did not have enough information to decide whether there was a risk of dismissal at all had the Respondent acted fairly. Though he did not submit it to me, it is consistent with his submissions to note that the Tribunal itself had found that, at the relevant time, Mr Racey himself knew sufficient to suppose that Mr Everett was involved in recruiting others for another company. 33. It is tempting sometimes to determine the exercise of establishing whether the prospects of a fair dismissal are such that there should be a reduction from compensation, where there has already been an unfair one, by saying that there is insufficient evidence. It may be, for instance, that to require a Tribunal to revisit the facts would be to require it to rewrite the world as it never was. But the Tribunal here did not give any detail of why it felt that, on the one hand, there was sufficient evidence for it to be clear that Mr Everett, though not Mr Colebrook, was in breach of his duties of loyalty as an employee and that that would justify summary dismissal (i.e. it would be a fair dismissal if conducted summarily) and on the other hand say that there was no evidence from which it could conclude that he might be fairly dismissed. The two are, in my view, inconsistent and irreconcilable. 34. Elias J, in Software 2000 Ltd and Andrews[2007] ICR 825 , observed that, even if there were limits to the extent to which it could be confidently predicted as to what might have been: “54.4. … [a Tribunal] must appreciate that a degree of uncertainty is an inevitable feature of the exercise. The mere fact that an element of speculation is involved is not a reason for refusing to have regard to the evidence.”