How do I retrieve a lost booking reference on The Trainline?

If a customer has lost their booking reference for a train journey made through The Trainline, there are several steps they can take to retrieve it. First, it is advisable to check the email inbox used during the booking process for any confirmation email sent by The Trainline. This email typically contains the booking reference number, along with other important details related to the journey. In addition, the customer can log into their account on the Trainline website or app, where past bookings should be listed along with their corresponding booking references. If the journey was booked without logging into an account, using the same email address to search for past bookings may help. If these methods do not yield the needed information, customers might consider referring to the help section on The Trainline's website for guidance on accessing booking details, which may provide further options to recover a lost booking reference. That section can offer useful insights to help navigate the situation effectively.