If you are a worker who has recently arrived in the UK, you will need to complete form P86. The form is used by HMRC to help them decide on a your residence and treatment for income tax and to give you the correct income tax allowances.
After completion, the form should be sent to your local tax office.
To obtain the form, click here.
If you do not have a National Insurance number, then you need to click here.
Click here for useful information on what is needed to open a bank account.