Virgin Money has offered a top-paying 5.85 per cent fixed rate ISA - but there's a catch. There is no minimum deposit amount to open and manage the account, the company says, as customers can get a market-leading 5.85 per cent with the bank's One Year Fixed Rate Cash ISA Exclusive Issue 7.

A person can pay money into the ISA as soon as it's opened and up until 30 days after the bank stops selling the account, up to the £20,000 annual ISA allowance. But there's a small and crucial detail to follow: the account is open only to current account customers with Virgin Money, or with Clydesdale Bank or Yorkshire Bank.

Virgin Money's Essential Current Account or any account with Northern Rock will not qualify a person to open an ISA. The account has to be opened online or in a Virgin Money branch. Funds can be paid in cash at a branch, via cheque, electronic transfer or by transferring an existing ISA.

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Customers can manage their accounts in writing, in a branch or over the phone, as well as with internet and mobile banking. There is no minimum amount needed to open the account and the account can stay open and be managed with any amount deposited.

Customers will be charged 60 days' interest on any withdrawals or transfers of funds to another account. A person can make a withdrawal at any time or transfer funds to another provider. This is a limited issue account so Virgin Money may withdraw the product from sale at any time without giving notice.