“Once you have submitted your application online you are unable to change any details.
However when your friend is confirming your identity they can advise of the address being incorrect and note the correct address on the form or separate piece of paper.
I would also advise for you to send in a cover letter with your correct address and proof of your address with your supporting documents.
If you require any further information, please contact us via e-mail: Liverpool@hmpo. gov.uk or call us on +44 (0)300 222 0000, Text Relay Prefix 18001”