How to collect the ticket for train travel when purchasing an electronic ticket in the UK? Thank you.

When you buy an electronic train ticket in the UK, you don’t need to go to the station to collect it. You can board the bus directly using your mobile phone or a printed voucher containing a barcode or QR code. When boarding the train, the conductor will check your mobile phone screen or printed voucher to confirm your ticket information. If you are using a mobile app, you may also need to display a dynamic verification code or QR code on your phone. Please make sure your phone has sufficient battery or that the printed voucher is clearly visible.