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AC meaning

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What does AC mean?
In practice, AC (access controller) describes the person, team or system that authorises and restricts access to premises, secure areas or IT systems, and manages user or visitor permissions. It is a descriptive term used across facilities, construction, events and information‑security contexts; it is not a defined term in UK or Irish legislation or case law and should not be confused with the “controller” in UK GDPR/EU GDPR. Key features typically include setting and operating access rules, screening entrants, issuing and revoking passes or credentials, keeping access logs, enforcing site or system policies, and coordinating with health and safety and information‑security requirements (for example, role‑based access control and least‑privilege principles). Regulatory touchpoints may arise. In England & Wales, Scotland and Northern Ireland, individuals who guard premises or screen entry to licensed premises commonly require a Security Industry Authority (SIA) licence under the Private Security Industry Act 2001 (for example, door supervisors/security guards). In Ireland, comparable activities may require licensing by the Private Security Authority under the Private Security Services Acts 2004–2021. Usage is broadly consistent across the UK and Ireland. Contractual definitions should specify scope, authority, data handling, audit trails, and liabilities to support compliance and incident response.
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NEWS
Lillystone v Bradgate Education Partnership: OLA 1957 duty confined to dangers from state of premises; gate-climbing a Tomlinson self‑inflicted risk—no duty owed (England and Wales)

Lillystone v Bradgate Education Partnership [2025] EWHC 3341 (KB) What are the practical implications of this case? Accidents caused by balls escaping play (Bolton v Stone [1951] AC 850) are not unusual. Incidents involving people climbing fences (Phillips v South East Education and Library Board [2015] NIQB 91; Wray v Derry City and Strabane District Council [2020] NIQB 39) also arise. More broadly, the decision reinforces that OLA 1957, s 1(1) limits the duty of care owed by owners/occupiers to dangers stemming from the state of the premises and to acts or omissions in relation to that state. Relying on Tomlinson v Congleton Borough Council [2004] 1 AC 46, the appeal court drew a distinction between hazards attributable to the condition of the premises where what was done, or not done, formed part of that condition—such as, for example, allowing speedboats to circulate in an...

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NEWS
Seddon v DVLA: Court of Appeal (England and Wales) confirms no duty of care to buyers of historic vehicles relying on V5C; restates pure economic loss duty criteria

Seddon v Driver and Vehicle Licensing Agency [2019] EWCA Civ 14, [2019] All ER (D) 139 (Jan) What are the practical implications of the judgment? The Court of Appeal in Seddon v Driver and Vehicle Licensing Agency held that the agency owes no duty of care to would‑be buyers of registered historic vehicles, notwithstanding knowledge that a car is being marketed and that questions have been raised about its identity and age. Of broader significance, and useful to practitioners generally, is Hamblen LJ’s succinct restatement of the factors the courts regard as pertinent when deciding whether to recognise a duty of care in claims for pure economic loss, providing a guide to the circumstances in which such a duty may, in principle, be imposed. What was the background? The respondent is an executive agency, sponsored by the Department for Transport, tasked under the Vehicle Excise and Registration Act 1994 (VERA 1994) with registering and licensing drivers and vehicles across the UK, and with collecting vehicle excise...

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NEWS
Hong Kong: Apparent bias 'real possibility' test confirmed; delay waives challenges—CNG v G (HKCFI [2025] 3598; HKIAC)

CNG Applicant and G 1st Respondent G 2nd Respondent SIL 3rd Respondent [2025] HKCFI 3598 What are the practical implications of this case? This ruling matters because it confirms the demanding bar for disqualifying arbitrators in Hong Kong and places that approach within a settled body of precedent. To begin, the court restated that the touchstone for apparent bias remains the ‘real possibility’ standard from Porter v Magill [2002] 2 AC 357, as adopted locally in Jung Science Information Technology Co Ltd v ZTE Corporation [2008] 4 HKLRD 776. Justice Chan underlined that firm case management, interruptions, or terse comments do not suffice. That position aligns with Helow v Secretary of State for the Home Department [2008] 1 WLR 2416 and Johnson v Johnson (2000) 201 CLR 488, which both make clear that resolve or impatience is not the same as bias. Practically, advocates should prepare clients for the reality that removing a tribunal member calls for far more than displeasure with demeanour or tone. In addition, the...

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PRACTICE NOTES
Contractual damages and remedies under English law: termination, causation, remoteness, mitigation, expectation/reliance/restitution, quantification (Ruxley), non-pecuniary loss, and liquidated damages versus penalties (Cavendish v Makdessi)

Overview This Practice Note forms part of our LLB Contract Law series for law students. It surveys the remedies for breach of contract, with damages at the heart of the common law response. Setting remedies within the framework of contract, it explains when a party may terminate—most notably for breach of conditions and of innominate (or ‘intermediate’) terms. It then sets out the expectation principle from Robinson v Harman (1848) 1 Exch 850, stressing that an award should put the claimant in the position they would have been in had performance occurred. The Note next traces the principal constraints on recovery—causation, remoteness, and the duty to mitigate—and discusses leading cases on mitigation to show how these limits operate even once breach is proved. It also considers alternative measures—expectation, reliance and, in rare cases, restitutionary recovery—before addressing quantification, including the contrast between ‘difference in value’ and ‘cost of cure’ illustrated by Ruxley Electronics v Forsyth [1996] AC 344. Finally, it deals with non-pecuniary loss and the contemporary approach to liquidated...

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PRACTICE NOTES
Archived Court of Protection case tracker: key England & Wales judgments (2021–2024) on capacity, best interests, medical treatment, deprivation of liberty and cross‑border issues

ARCHIVED: This tracker is archived and no longer updated. For an overview of Court of Protection cases from 2025 onwards, see: Court of Protection—table of cases. P, Re (Property & Affairs Deputyship: Jurisdiction) [2024] EWCOP 77 (T2) Court of Protection determines it has jurisdiction to consider whether P’s mother should continue as property and affairs deputy The proceedings related to P, an adult who sustained a brain injury in an accident and had a substantial personal injury claim. His mother had been appointed by the Court of Protection as his property and affairs deputy, and the present decision addressed an application seeking to revoke that appointment. The litigation had been protracted. Earlier, the court permitted ‘closed material’ to be withheld from P’s parents to facilitate capacity assessments; for a summary of that ruling, see here. Despite that step, neither the Official Solicitor nor the court gained clarity about P’s condition or even his location. It was reported that P was now residing in Italy. HHJ Burrows concluded that...

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PRACTICE NOTES
Case C‑194/14 P, AC‑Treuhand v Commission: CJEU confirms Article 101 TFEU liability for cartel facilitators; Commission fine upheld (Heat Stabilisers cartel)

CASE HUB (date of judgment—22/10/2015) (ARCHIVE 22/10/2015) See further: timeline, commentary and related/relevant cases ARCHIVED — this archived case hub reflects the position at the date of the decision of 22 October 2015; it is no longer maintained. Case facts Outline AC‑Treuhand, a consultancy, appealed against the General Court’s judgment which upheld the Commission’s 11 November 2009 decision finding infringements of Article 101 TFEU and Article 53 EEA and imposing a €348,000 fine on AC‑Treuhand for its alleged role as a facilitator of a Europe‑wide cartel concerning the supply of tin and ESBO/esters heat stabilisers (the “Heat stabilisers cartel”). On 22 October, the Court of Justice dismissed the appeal and affirmed the General Court’s judgment and, in consequence, confirmed the underlying Commission infringement decision in so far as it related to AC‑Treuhand. The case centres on the potential liability under Article 101 TFEU of intermediaries and consultants for assisting the collusive conduct of others. Its principal interest lies in whether Article 101(1) TFEU extends to such facilitation...

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Q&As
Retrospective Licence to Alter: AC Unit Replacement Precedent

Common practice is to use a retrospective licence to alter after works have already been fully completed...

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