“once a cause of action has been held to exist or not to exist, that outcome may not be challenged by either party in subsequent proceedings.”
“… there may be an exception to issue estoppel in the special circumstances that there has become available to a party further material relevant to the correct determination of a point involved in the earlier proceedings … being material which could not with reasonable diligence have been adduced in those proceedings.”
“(1) The grounds for making a proposal to alter a list are as follows - (a) the rateable value shown in the list for a hereditament was inaccurate on the day the list was compiled; (b) the rateable value shown in the list for a hereditament is inaccurate by reason of a material change of circumstances which occurred on or after the day on which the list was compiled; … (d) the rateable value shown in the list for a hereditament by reason of an alteration made by a valuation officer is or has been inaccurate; … (3) No proposal may be made - … (b) by an interested person, where - (i) that person (or a person having a qualifying connection with that person) has made a proposal to alter the same list in relation to the same hereditament on the same ground and arising from the same event; (ii) a proposal to alter the list in relation to the same hereditament and arising from the same facts has been made by another person (excluding a person having a qualifying connection with the interested person) and has been considered and determined by a valuation tribunal (otherwise than as mentioned in regulation 30(4)) or, on appeal under regulation 37, by the Lands Tribunal1; (c) on the ground set out in paragraph (1)(d), to the extent that the alteration in question gives effect to the decision of a valuation tribunal, the Lands Tribunal or a court determining an appeal or an application for a review from 1 Now the Lands Chamber of the Upper Tribunal. 8 a valuation tribunal or Lands Tribunal in relation to the hereditament concerned.”
“A second action is not the less harassing because the defendant has been driven or thought it prudent to settle the first; often, indeed, that outcome would make a second action the more harassing.”
“53 … that the issue of rateable value of the hereditaments in the 2010 list was res judicata and barred from further challenge in view of the settlement of the original appeals and that the second appeals therefore have no reasonable prospect of succeeding and they should be dismissed under regulation 10(3)(c) of the Procedure Regulations.”
“(3) The Tribunal may strike out the whole or a part of the proceedings if … (c) the Tribunal considers there is no reasonable prospect of the case of the appellant, applicant or claimant, or part of it, succeeding.”