To set up regular payments online, you’ll need to first sign in to your account, and click on Savings. This allows you to review your Retiready product and from here just:

• Select ^More in the drop-down option in the centre of the page or select the Manage your pension or Manage your ISA option if you’re using a mobile device
• You’ll then see further options to select, Regular Contribution or One-Off Contribution

Select Regular Contribution and complete the steps to set up your regular payments.
You’ll need your bank details.