The implication of good faith in commercial contracts has long been a contentious issue in English law. While some jurisdictions adopt an overarching duty of good faith, English courts have historically taken a more cautious and piecemeal approach. The recent High Court decision in Macdonald Hotels v Bank of Scotland [2025] EWHC 32 (Comm) re-ignite this debate, delivering fresh guidance on the circumstances under which a duty of good faith may be implied into commercial agreements and what it means for businesses operating under long-term commercial agreements.