As well as opening a main business account, we also recommend that you open a tax savings account, which should be interest bearing. It may actually be a building society account rather than a bank account. We recommend that you make regular monthly transfers from your main business account to your tax savings account(s) to save for the payment of VAT, income tax and national insurance.
If your business is run through a company then it is essential to open a company bank account. A company is a separate legal entity to the individuals who own or run it. If you put company monies in your personal bank account then there will be adverse tax implications.