Realised gains

[Chieftain]

Hi all
This has probably been asked before but here goes.
I have a fund/share account with Hargreaves Lansdown and I also have a stocks/shares ISA account with them.
If,for some reason i wished to sell all my holdings in my fund/share account,but left all the cash with HL with a view to buying more stocks/funds in the future,would that be classed as a realised gain? Or would it be only classed as a realised gain when I’ve completely removed it from HL to my private bank account?
On a similar note with regard to my stocks/shares ISA,if I’d put 20k in the isa in-for example-2023,and it had grown to 25k in 2025 and i wished to sell everything in it,if I left the cash in the ISA and in 2026 used that same cash to purchase different stocks/funds,would that cash still be classed as my 2023 ISA allowance,or would it be classed as my 2026 allowance?
Many thanks in advance

[AGoodman]

You make the disposal when you sell the investments. It doesn't matter if the cash remains with the platform.

The ISA allowance only limits additions to the ISA. In the scenario you describe, you wouldn't use any allowance as the cash remains within the ISA wrapper throughout.

[Chieftain]

Agoodman-thank you very much for your reply