“22.1 The adjudicator must attempt to answer the question referred to him. The question may consist of a number of separate sub-issues. If the adjudicator has endeavoured generally to address those issues in order to answer the question then, whether right or wrong, his decision is enforceable: see Carillion Construction Ltd v Devonport Royal Dockyard Ltd[2005] EWCA Civ 1358 . 22.2 If the adjudicator fails to address the question referred to him because he has taken an erroneously restrictive view of his jurisdiction (and has, for example, failed even to consider the defence to the claim or some fundamental element of it), then that may make his decision unenforceable, either on grounds of jurisdiction or natural justice: see Ballast PLC v The Burrell Co Ltd[2001] BLR 529 ; Broadwell v k3D [2006] ADJCS04/21; and Thermal Energy Construction Ltd v AE&E Lentjes UK Ltd[2009] EWHC 408 . 22.3 However, for that result to obtain, the adjudicator's failure must be deliberate. If there has simply been an inadvertent failure to consider one of a number of issues embraced by the single dispute that the adjudicator has to decide, then such a failure will not ordinarily render the decision unenforceable: see Bouygues (UK) Ltd v Dahl- Jensen (UK) Ltd[2000] BLR 49 and Amec Group v Thames Water Utilities Ltd[2010] EWHC 419 (TCC) . 22.4 It goes without saying that any such failure must also be material: see Cantillon v Urvasco and CJP Builders Limited v William Verry Limited[2008] EWHC 2025 (TCC) . In other words, the error must be shown to have had a potentially significant effect on the overall result of the adjudication: see Keir Regional Ltd v City and General (Holborn) Ltd[2006] EWHC 848 (TCC) .”
“The reports provided regarding the BMS do not identify that the issues have been caused by workmanship issues and/or issues for which AMD is responsible. I therefore do not accept that AMD should not be paid for this work which represents the expenditure of a provisional sum. In terms of quantum, the build up supports the valuation of£34,165.52 and not the revised amount claimed.”