BS3621, TS007 and Sold Secure: which applies?

Match the standard to the job

• BS3621 concerns a thief-resistant lock assembly operated by key on both sides, often relevant to suitable traditional external doors. It does not certify an entire door, and it is not the universal label for multipoint systems.
• BS8621 provides keyless operation from inside. Ask about appropriate escape hardware rather than specifying a key-operated inside lock for every door.
• For suitable replacement euro cylinders, TS007 three-star protection can be provided by a three-star cylinder, or a compatible one-star cylinder with two-star protective hardware. A one-star cylinder alone is not that combination.
• Sold Secure SS312 Diamond is a cylinder approval. Check the exact model and grade in the official register; a Sold Secure rating for another product category is different.

Check the installation and your policy

Multipoint lock assemblies, complete doorsets, smart locks and safes have different test contexts. Ask which certification covers the supplied product, configuration and installation; do not infer whole-door or smart-lock certification from a cylinder's label.

• Check the current certificate and the insurer's requirements before ordering.
• Safe escape, fire-door compatibility and correct installation matter alongside attack resistance.
• These standards and schemes are not a blanket legal requirement to fit the same lock in every home, nor a promise that entry is impossible.