If you have a Cash ISA that has been transferred in from an existing ISA provider, an Easy Access Cash ISA will be opened and the funds from the cancelled Cash ISA will be transferred into the Easy Access Cash ISA allowing withdrawals and transfers to take place easily.
If you have a Cash ISA that has been funded from your nominated bank account, you can cancel within the cooling off period and these funds will be returned to your nominated bank account.
If you cancel an ISA within the cooling off period, you can still open an ISA and your full annual subscription limits will remain, provided that the cooling off period is within the same tax year. If you close an ISA after the cooling off period, the withdrawn subscription will count as a subscription to an ISA for the current tax year.