In self-service stores, taking goods to checkout constitutes offer.
[Display of goods on shelves = mere invitation to treat]
Contract completed when payment given.
About Legal Case Notes
Legal Case Notes is the leading database of case notes from the courts of England & Wales. Court judgments are generally lengthy and difficult to understand. Lawyers rely on case notes - summaries of the judgments - to save time. I have written over 600 high quality case notes, covering every aspect of English law. These are available on the site in clear, indexed form.