Flexible ISAs allow you to withdraw and replace funds from some of our cash ISAs without affecting your yearly ISA allowance, providing you replace funds in the same tax year you withdraw them.
Your ability to withdraw and replace funds may be limited by the particular account conditions of your ISA, for example, if you have a Help to Buy: ISA.
The flexible allowance from the withdrawal of prior year funds cannot be transferred between ISA providers. If you do not replace withdrawals before a transfer, the allowance will be lost.
The ISA limit for the year still applies so you can only hold a maximum of £20,000 across your cash ISA, stocks and shares ISA, lifetime ISA and innovative finance ISA.