Mill Hill East, Roding Valley and South Kenton all have insufficient space for ticket barriers, Transport for London said. The entrances are instead equipped with ticket validators where you can tap in, and are also monitored by staff and CCTV.
People Also Ask
All stations built after the mid-2000s have some form of platform barrier.
The overground are more traditional trains as opposed to the metro style for the Underground. Overground is more of a ring around central London - it's useful for avoiding going via central London if you don't want to.