Choose the correct classification vocabulary
Industry codes organise declared activities, but their meaning depends on the classification, version and country using them. The UK Companies House SIC list is a condensed filing list, not a universal directory of licences. Select a code by reading its official description rather than matching a familiar number from another national system.
Use the code as a research filter
The Companies House advanced search accepts SIC codes, helping narrow a set of entities for further review. A company may report several activities, and a recorded code does not establish the scale or current reality of each operation. Compare the result with filed business descriptions and relevant national records, such as DATA INPI for French enterprises, before drawing commercial conclusions.