@me123321 You almost certainly are wrong. Credit card interest will always be higher than the interest you earn on savings accounts.
Put £1000 in a 5% saving account for a year and you make £50.
Now let's say you had £1000 in cc debt with an APR of 23% (about average). Over a year you'd pay...
@me123321 Why wouldn't you use the £1000 to pay off the credit card debt?
It sounds like what you're looking for is an easy-access savings account. MSE has a guide: https://www.moneysavingexpert.com/savings/savings-accounts-best-interest/#easyaccess