When the provisions of sections 170 to 178 of the Companies Act 2006 were introduced and codified the law of directors' duties, they were heralded by the Government as representing a long overdue modernisation of the applicable law. In particular, commentators pointed to section 172 of the Act which enjoined directors to take decisions in a way which would promote the success of the company for the benefit of the members as a whole, pursuant to which they were compelled to consider the interests of stakeholder constituencies such as suppliers and employees.
However, on closer inspection, the statutory codification is not as radical as perhaps one might initially think. This has been noted by the judiciary south and north of the border. For example in West Coast Capital (Lios) Ltd.  CSOH 72 at para.  Lord Glennie made the following obiter statement:
“It is no doubt because of the need to show that the conduct of the directors or the majority is in breach of some agreement or duty that the Dean of Faculty drew my attention to ss.171 and 172 of the 2006 Act. There was no equivalent in the earlier Companies Acts, but these sections appear to little more than set out the pre-existing law on the subject.”
A similar point was made by Warren J in Cobden Investments Ltd. v RWM Langport Ltd.  EWHC 2810 (Ch) at para.  and Lord Hodge in Eastford Ltd. v Gillespie  CSOH 132; 2010 G.W.D. 32-656 at paras. -. Indeed, in Eastford, Lord Hodge examined the relationship between the common law and the statutory statement of directors' duties. In particular, he drew attention to section 170(3) of the Act which directs that the statutory provisions replace the common law and then went on to explain the purpose of section 170(4) of the Act.
“One must look to the purpose of the statutory statement which is revealed in the 2006 Act. Subsections (3) and (4) of section 170 set out the relationship between the general duties which are stated in the Act and the pre-existing common law rules and equitable principles on which they are based. Subsection (3) provides:
'The general duties are based on certain common law rules and equitable principles as they apply in relation to directors and have effect in place of those rules and principles as regards the duties owed to a company by a director.'
Thus the statutory statements replace such of the common law rules as have been subjected to statutory formulation. But sub-section (4) provides:
'The general duties shall be interpreted and applied in the same way as common law rules or equitable principles, and regard shall be had to the corresponding common law rules and equitable principles in interpreting and applying the general duties.'
This subsection seeks to address the challenge which the Law Commissions and the Company Law Review had identified, namely of avoiding the danger that a statutory statement of general duties would make the law inflexible and incapable of development by judges to deal with changing commercial circumstances. Parliament has directed the courts not only to treat the general duties in the same way as the pre-existing rules and principles but also to have regard to the continued development of the non-statutory law in relation to the duties of other fiduciaries when interpreting and applying the statutory statements. The interpretation of the statements will therefore be able to evolve. The statutory statement of the general duties of directors is intended to make those duties more accessible to commercial people. I see nothing in the statutory provisions, including section 180(5) (which provides that, subject to specified exceptions, the general duties have effect notwithstanding any rule of law), which suggests that Parliament intended to alter the pre-existing rules on ratification by a board of a director's unauthorised acts. I am supported in my opinion by Lord Glennie in West Coast Capital (Lios) Ltd Petr  CSOH 72, (at para 21) in which he expressed the view that section 171 of the 2006 Act did little more than set out the pre-existing law on the subject. I also derive some support from leading company law textbooks such as Gore-Browne on Companies (at para 15[8A]) and Palmer's Company Law, which (at para 8.2309) suggests that older cases remain relevant to the interpretation of the statutory duties "since the codified duties are generally formulated in a way that quite faithfully reflects the older case law". The statutory formulations do not, by a side wind, alter the law of agency or prevent ratification of the unauthorised acts of a director.”
On another note, if some of the directors of a company commit the company to take a particular course of action without the authority of the board of directors, is it the case that they have breached the company’s constitution contrary to section 171(a) of the Act? This was one of the other issues considered in Eastford. Lord Hodge answered that question in the affirmative, but went on to on to hold that there was no rule which provided that an unauthorised act of a director could not be ratified by the board of directors in paras. -:
"It is well established at common law that, unless a company's constitution otherwise provides, a board of directors can, within a reasonable time, ratify the acts of a director or directors who, when they acted, had no authority to bind the company: Re Portuguese Consolidated Copper Mines Ltd  LR 45 Ch D 16, Breckland Group Holdings Ltd v London & Suffolk Properties Ltd  BCLC 100 and Municipal Mutual Insurance Ltd v Harrop  2 BCLC 540. See also Danish Mercantile Co Ltd v Beaumont  Ch 680. The statutory statement of the general duties of directors in Chapter 2 of Part 10 of the 2006 Act has not superseded that line of authority. Section 171 provides that a director of a company must act in accordance with the company's constitution. That might, taken by itself, suggest that an unauthorised act could not be ratified. But it is clear on examining the statutory statement of the general duties of directors that that statement does not prevent a company by a resolution of its board from ratifying the acts of a director which were unauthorised but were within the power of the board."
The above analysis is interesting, particularly when considered against the backdrop of section 239 of the Act which is a provision which had no precursor or counterpart in the Companies Act 1985 and does not appear to have been considered in Eastford. Since a breach of section 171(a) of the Act clearly amounts to a breach of a duty of a director to obey the constitution, one wonders what remains of the cases of Re Portugese, Breckland Group Holdings, Municipal Mutual and Danish Mercantile in light of section 239(1) and (2) of the Act which provides 'This section applies to the ratification by a company of conduct by a director amounting to negligence, default, BREACH OF DUTY or breach of trust in relation to the company… [and t]he decision of the company to ratify such conduct MUST be made by resolution of the members of the company.' It is submitted that the above clearly demonstrates that the company only has the power to ratify a breach of section 171(a) via the medium of an ordinary resolution of the shareholders and the board has no locus to do so. It would have been interesting to note if the result would have been the same if the role of section 239 of the Act had been analysed. Admittedly, one might argue that a breach of agency authority on the part of a director would not amount to a breach of the constitution on the facts of Eastford when two of the directors (out of a total of 4) instructed the company's lawyers to raise legal action without the consent of the other two directors. However, since Lord Hodge's judgment tells us that Eastford's articles of association/constitution were based on Table A, there is no mileage in any argument that the two directors had not breached the company's constitution when they raised the legal action, since Table A regulation 88 provides that all 'questions arising at a meeting shall be decided by a majority of votes' and Table A regulation 92 directs that decisions taken by the directors outwith a board meeting must be taken by a resolution in writing signed by every director. Since the decision had not been taken in accordance with Table A regs 88 or 92, the inevitable conclusion is that the two directors were clearly in breach of section 171(a) of the Act when they took such a decision to initiate legal action. Breach of section 171(a) is a breach of a director's duty and so only an ordinary resolution of the shareholders (which complies with section 239(3) and (4) and (7) of the Act) can serve to lawfully ratify the director's breach. Curiously, if the directors had exceeded their powers by settling or releasing a legal action already commenced, the position might be different (see section 239(6)(b) of the Act), but that was not the case in Eastford. To that extent, although some things remain the same post-Companies Act 2006, others have indeed changed, namely the mechanics of the law of ratification of breaches of directors' duties.