"Harassment, bullying, victimisation, constructive dismissal"
"In the first place, it must be recognised that the Henderson v Henderson rule applies in full measure in ordinary courts irrespective of whether the person being estopped was or was not legally represented in the earlier proceedings. Secondly, the EAT's own jurisprudence clearly establishes that a point not taken by a party in the Industrial Tribunal cannot be taken on appeal to the EAT even though the fear to take it originally was due to the lack of skill of experience of the party's advocate and even though the omission could have been rectified by the Industrial Tribunal taking the point itself."
"It must be recognised, however, that in the Henderson v Henderson context, abuse of process involves no particular condemnation of the person estopped. The rule applies even if the point was omitted by inadvertence or even accident"
"But Henderson v Henderson abuse of process, as now understood, although separate and distinct from cause of action estoppel and issue estoppel, has much in common with them. The underlying public interest is the same: that there should be finality in litigation and that a party should not be twice vexed in the same matter. This public interest is reinforced by the current emphasis on efficiency and economy in the conduct of litigation, in the interests of the parties and the public as a whole and that a party should not be twice vexed in the same matter. This public interest is reinforced by the current emphasis on efficiency and economy in the conduct of litigation, in the interests of the parties and the public as a whole. The bringing of a claim or the raising of a defence in later proceedings may, without more, amount to abuse if the court is satisfied (the onus being on the party alleging abuse) that the claim or defence should have been raised in the earlier proceedings if it was to be raised at all. I would not accept that it is necessary, before abuse may be found, to identify any additional element such as a collateral attack on a previous decision or some dishonesty, but where those elements are present the later proceedings will be much more obviously abusive, and there will rarely be a finding of abuse unless the later proceeding involves what the court regards as unjust harassment of a party. It is, however, wrong to hold that because a matter could have been raised in early proceedings it should have been, so as to render the raising of it in later proceedings necessarily abusive. That is to adopt too dogmatic an approach to what should in my opinion be a broad, merits-based judgment which takes account of the public and private interests involved and also takes account of all the facts of the case, focusing attention on the crucial question whether, in all the circumstances, a parry is misusing or abusing the process of the court by seeking to raise before it the issue which could have been raised before. As one cannot comprehensively list all possible forms of abuse, so one cannot formulate any hard and fast rule to determine whether, on given facts, abuse is to be found or not. Thus while I would accept that lack of funds would not ordinarily excuse a failure to raise in earlier proceedings an issue which could and should have been raised then, I would not regard it as necessarily irrelevant, particularly if it appears that the lack of funds has been caused by the parry against whom it is sought to claim. While the result may often be the same, it is in my view preferable to ask whether in all the circumstances a parry's conduct is an abuse than to ask whether the conduct is an abuse and then, if it is to ask whether the abuse is excused or justified by special circumstances. Properly applied, and whatever the legitimacy of its descent, the rule has in my view a valuable part to play in protecting the interests of justice."