Insurance Approved Sash Locks
British Standard BS3621 Sash Locks. Sash locks have a latch and a deadbolt in the built of the lock. These locks would require handles to operated the latch.
This should be the preferred choice for locks that are needed to secure the final exits of buildings. For example your front door or back door. This is because they don't require locking to keep the door shut, you can have them simply operated by handle when you see fit, and lock them completely when leaving the property or overnight etc.