Correct address to return BRP

My wife received an email from Home Office Atlas after her naturalisation was approved. The email read as follows
“Your BRP card should be cut in half and posted (in a windowless plain envelope) to Biometric Product Returns, IFB, 5th floor Lunar House, 40 Wellesley Road, Croydon, CR9 2BY. The postage is not refundable.”

However, when I checked the GOV website regarding what to do after receiving your certificate under British Citizenship, it mentions a different address
Naturalisation BRP Returns
PO Box 195
Bristol
BS20 1BT
https://www.gov.uk/apply-citizenship-sp ... ertificate

Which is the correct address to return the BRP?

Either, it doesn't matter which one you send it to.