Most doors are secured with a traditional rim lock commonly referred to as a Yale lock. A rim lock provides good security but should always be used in addition to other locks.
The lock below is a Yale lock that conforms to British Standard 3621.
The mortice lock is often a minimum requirement of your insurance company and should be a five-lever device. The lock below is typical and can be installed at a different part of the door and therefore avoid creating a weakness point in the actual door or frame.
Multipoint Locking Devices
The preferred method of securing a door would be by installing a multipoint system. Some insurers will give you discounts on your house contents insurance if such a system is fitted. The cost of installation is higher but this system will make your door fit more snugly and could reduce draughts.
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