When there is any disruption on this route, trains and stations can get very busy and this part of the line can sometimes be unreliable.
What we’re doing to help
A failure in the tunnel can prevent trains accessing the other stations. To keep the train service moving, and to prevent customers being stuck on trains, we move trains as quickly as possible to London Kings Cross. This isn't the perfect solution for all customers but we must balance out the wider train service and the customer needs. The key objective is to keep trains moving for safety reasons.