Bumping or any other opening technique are sensitive subjects and as accredited London locksmiths we will not disclose too much information as how someone may open a door by these techniques.
Bumping is a technique mainly used by locksmiths to open doors when a non destructive entry is necessary, however it has been thought that many intruders have used these techniques too….however it is hard to prove if someone has bumped a lock to gain access as there is virtually no marks on the lock. For this reason it is advisable that a bump resistant cylinder is fitted if there is any concern that bumping is occurring in your area.
Where do you get bump resistant cylinders? Well you will not find it in your local DIY shop. It is advisable that you speak to a specialist locksmith in London as these cylinders will need to be the right size (and shape!) for your door.