Accidentally Withdrawn Funds from Stocks and Shares ISA

Hi, I deposited £20,000 into my stocks and shares isa account for my annual contribution, then accidentally withdrew the same £20,000 from that account instead of my other account on the same brokerage. Am i able to contribute this back as I did not intend to withdraw anything out of my ISA.

Hi Sally Kelly,
Only if it is a flexible ISA.
Thank you.