Bicycle Security
The vast majority of cycle thefts are opportunist thefts. Someone sees a bike which is not secured or secured badly and take it because it's easy to do so. This is particularly common when riders "just nip into the shop" and are away for just a few minutes. The trouble is that it takes just a few seconds for the opportunist to take a bike which is not secured. Most will ride the bike away. To prevent this type of theft you should ensure that your bike is secured in such a way that it cannot be ridden away, either by immobilising it in some way, if you will only be away for that "couple of minutes", or by securing it to a fixed immovable object if your absence will be for a longer period of time.
There are a number of bikes stolen each year from within peoples own properties, either from sheds and garages or simply from the back yard. These thieves are far more accomplished in their skills and it takes a substantially different type of lock to prevent this type of thief from stealing your bike.
