ISA rules

I have 2 Flexible Stock ISAs with 2 different providers and have not paid into either (i.e. not used my annual allowance) for the current tax year (2024/2025). Earlier this tax year I withdrew money (more than £25k) from Stock ISA 'A' but would now like to add this back to an ISA account before the end of the tax year. Q1: I believe that this is allowed and I should be able to add back the full amount? Q2: I would like to not add this back to ISA 'A' but instead to ISA 'B'. Is this possible? Q3: Or do I have to add back to ISA 'A' (and then transfer to ISA 'B')? To be clear, if possible, I would like to avoind this option under Q3 Thanks

Hi,
You can see guidance here:
Individual Savings Accounts (ISAs)
Thank you.

The answer is cleaer regarding whether i can add back (Q1), but I can't see that Q2 / Q3 is answered

Hi,
If you have a flexible ISA, you can put the money back into the same ISA and not affect your £20,000 allowance. If you move the money to another ISA, it does affect your allowance. You should speak to your ISA providers about this.
Thank you