Locksmith not only duplicates existing keys. He also runs and he is an employer of that business in which he has to installs, repairs, open locks and makes keys for locks. If you want to become a locksmith there are two ways. One is you need to attend trade school and the other is to obtain a certificate from the training school of locksmith. There are some of the countries where license is important for the locksmith without it they cannot perform their task and those who provide services without the license they are not the right locksmith.
So when you need a locksmith service ask them for the license also by which you will be sure that you are getting the right service from the right coventry locksmith.