BS 13670 is the "How-To" manual for building concrete structures designed under Eurocode 2. It covers everything from the moment the concrete mix arrives on site to the final completion of the structure.
If the design is based on Eurocode 2 (BS EN 1992), the execution must comply with BS 13670 to ensure the design assumptions (like cover, strength, and tolerance) are valid. bs 13670
If you have a specific feature in mind, please provide the following: BS 13670 is the "How-To" manual for building