Commingled goods are tangible goods that have been mixed or combined so that the individual items or original contributions can no longer be separately identified or detached without loss or disproportionate effort. In commercial and property law across England and Wales, Scotland, Northern Ireland and Ireland, the term is descriptive rather than a defined statutory concept, but it is recognised in case law and practice, particularly in relation to security over goods, sale of goods, bailment and insolvency.Typical examples include grain, oil, bulk liquids or fungible stock stored together in a shared tank, warehouse or pipeline, where different owners’ goods are indistinguishable. Key legal issues include: whether title passes to a co‑ownership share in the mass; priority and enforceability of retention of title and fixed or floating charges; and identifying rights on insolvency or enforcement.Under the Sale of Goods Acts and related case law, parties may acquire undivided shares in a bulk once certain conditions are met. Scots law treats mixtures through principles of accession, specification and commixtion, but the commercial outcomes are broadly similar. Clear contractual terms on risk, title, allocation of shares and rights on mixture are critical when dealing with commingled goods.