This is because the overpayment information you previously made on the old system will not be carried over to the new system.
You can set up your overpayment arrangement by downloading this overpayment form (PDF, 163KB), completing it and returning it to us at the freepost address below:
Mortgages
FREEPOST
PO Box 4
Gloucester
GL4 3RL
Alternatively, we have a dedicated team who can help you set up your overpayment again. You can call them on 0800 068 9565 (lines are open Monday to Friday 8am – 8pm and Saturday 9am – 4pm).