Add a line to my address

[#1]

I wish to keep the same address but add something to the top of the address.

Is this possible?

I am unable to edit my address and the text I wish to add is not registered with Royal Mail.

[#2]

@MMG 

To my knowledge the address needs to match Royal Mail's listing.

Can you not add the text with Royal Mail 1st then update it with PN?

[#3]

Any idea how?

[#4]

This could be the way to change your address:

https://www.royalmail.com/personal/receiving-mail/update-your-address

Regards