Replacement, Change, Installation, or Repair — What Is the Difference?
These four terms are often used interchangeably but they mean distinct things. A lock change means swapping an existing lock or cylinder for a new one of the same or a better type — the most common request we receive. A lock replacement goes a step further: the old hardware is completely removed and a fresh unit is fitted, often because the case or body is damaged beyond adjustment. A new installation is for a door that currently has no lock at all, or where a second lock is being added for extra security. A repair covers mechanical faults such as a stiff bolt, a loose cylinder, or misaligned keeps — sometimes the lock just needs adjustment and no parts are needed at all. When you call 020 3757 5689, our technician will assess which of these applies and confirm an exact up-front price before any work begins, so there are no surprises on the invoice.
The factors that shape the final quote include the type of lock and door, the grade of replacement cylinder or case you choose, the time of day (evenings, weekends, and bank holidays carry a different rate), and travel distance from our nearest available technician. What never changes is our commitment to giving you that confirmed figure before we start.





