It depends on whether you're switching to a new lender or sticking with your current provider, but you'll likely need:
* Photo ID like a driving licence
* Proof of address
* Three months of bank statements
* Wage slips (3-6 months)
* Evidence of any other income
[Self-employed homeowners](/mortgages/guides/self-employed-mortgages/) may need to provide accounts or other proof of income.
It is also worth [accessing your credit record](/guides/how-to-check-your-credit-record/) to check it's up to date and accurate.