As from 6 April 2022 the guidance for the registered office address of a company has been updated in line with Trading Standards recommendations and section 86 of the Companies Act 2006.
If you choose to engage a third party agent to handle your mail, you must ensure that the arrangements provide for all mail to be forwarded to you regardless of its source.
Details of the new requirements can be found in section 1.8 of the companies house incorporation and names guidance which can be accessed here.