No idea but cash ISAs are a bit shit atm
This seems to be best atm 0.65
A normal savings account is slightly better 0.75
There’s always regular savers to try first but you usually need to have a current account too unless it’s a BS (1.55) like this.
Also they obv tie you into a year before you can access it.
2.75% but you have the pain of creating a HSBC account.