You can switch a personal current account, joint current account, sole trader account or a business account to Starling Bank. 

If you are overdrawn at your old bank your overdraft balance on your old account will not be automatically transferred and you will need to make arrangements with your old bank to repay your outstanding balance before you switch. 

Some banks treat sole trader accounts as business current accounts so if this is the case the switch may fail and you will need to get in touch with customer services.