Right now, only existing customers can open a Tembo Fixed Rate Cash ISA, but very soon this will be available to new customers as well.
To be eligible for a Tembo Fixed Rate Cash ISA, you must:
be at least 18 years old
be a UK resident for tax purposes
have a National Insurance number
have a valid email address
Open a Fixed Rate Cash ISA with a minimum £500 balance. To do this, you'll also need to have at least £500 remaining in your £20,000 ISA allowance for this tax year. Otherwise, you'll need to wait until the next tax year to open one.