Not wanting to scare you, but more than 800 bikes are stolen every single day in England and Wales. The London Cycling Campaign recommend using two different locks. The classic combo is a chain lock and a D-lock - and we sell both!
A good rule of thumb is that the heavier the lock, the safer your bike. Cheap locks will act as a visual deterrent to opportunists, but won’t stop a dedicated bike-jacker. If you love your bike, spend as much as you can afford on your locks!