You can do this by logging onto your account or by calling us to give the number of calendar days' notice appropriate to your Cash ISA. Provided you choose to withdraw all your money your account will be closed.
We will move the money to your nominated account for you on the selected date and it will be credited to your account within 2 business days.
Alternatively you can transfer your Cash ISA to another provider by contacting them and advising them of a transfer date. You can transfer your account to another provider without giving full notice however a penalty equivalent to 30 days' loss of interest applies.