This article relates to domain names ordered through 123-reg.co.uk
This answer will explain how to setup a Domain backorder.
In the Domain names section click on the Domain backordering option.
Enter the domain name you wish to back order in the search bar and click the magnifying glass icon to start the search.
Select the domain you wish to backorder by clicking the Backorder button.
Your Backorder will be added to the basket, click on Checkout to continue.
Review your basket and press the Continue button to proceed.
Tick the I agree to the domain backorder terms and conditions box and click on the Continue button.
Then follow the steps on screen to complete your purchase.