Reducing current maxed-out ISAs to open a new one

Hi, current situation is that I have 2 ISAs Cash - 10k Shares - 10k so effectively maxed out for 24/25 tax year currently My problem is that in Feb 25 I have a company sharesave scheme maturing and the shares have done madly over the option price, basically 500%+ increase ( I know, feel very fortunate), and rise will be more than 3k. In order not to incur CGT the company advice is to put in ISA. So my question Can I reduce my current holding by withdrawing either from the Cash ISA or Share ISA and that would reduce my ISA holdings to below 20k and could I then open a new ISA for my sharesave options? Thank you :)

Hi,
You can open more than one ISA, but if you have contributed the £20000 for this current tax year, then you cannot make any further deposits until after 6 April 2025.
Thank you.