How much notice do I need to give to withdraw?

For withdrawals of up to £1,000 in any 12-month period, you need to give one month's written notice. For any further withdrawal in that same 12-month period, or for a single withdrawal of more than £1,000, you need to give three months' written notice.

You can only have one withdrawal request outstanding at a time. You'll need to wait for your current request's notice period to end before submitting another.