Costco is a membership-based warehouse retailer in the UK, selling groceries, household essentials, toiletries, home and kitchen items, TVs and other electronics, computers, furniture, tyres, and seasonal products. It is known for larger pack sizes and bulk-buy options across many everyday categories.

Deals often come through member-only pricing, limited-time promotions, and seasonal reductions, with savings most noticeable when buying multipacks or bigger formats. Some items are sold as special buys that change regularly, so prices and availability can vary from week to week.

Costco trades online at costco.co.uk and through warehouse locations, with access tied to membership. Online ranges and pricing can differ from what you see in-warehouse, and delivery is offered on many non-food items.