Return old BRP Card address

Hi guys my wife has got her ILR and on the successful email they have said send it to the following address:-

Biometric Product Returns, IFB,5th floor Lunar House, 40 Wellesley Road, Croydon, CR9 2BY

and when my wife received her new BRP the address says to send it to:-

BRP Returns, P.O. Box 195, Bristol, BS20 1BT

Which address do I send this to? would appreciate it

This has the Bristol address... would be nice if they put the same address everywhere, wouldn't it?

https://www.gov.uk/apply-citizenship-indefinite-leave-to-remain/after-you-get-your-certificate

Oh crap! Ive sent it to the Croydon address now! Hope that aint going to cause a problem