Your entry reservation slot does not have a barcode because it is not a scannable entry ticket for Madame Tussauds London. Entry Reservation slots simply let our Admissions team know that you have booked a space for your visit on the correct date and time, which is different to the date and time you originally booked.
Entry reservation slots on their own cannot be used for entry into the attraction; you must also bring your original ticket(s) for our Admissions team to scan.