my documents was in the belfast team but closest was victoria, i knew i couldn’t travel to belfast so i had to settle for victoria and hoped something happened
i also applied by post
the lady told me i had to wait longer to receive a call since there was discrepency between my doc location (belfast) basically belfast team had to look and agree for victoria to do anything
waited over 4 houts for the belfast team to give the go ahead and then received my passport a day later
so i say ideally go where document is located but you are still able to receive passport from any HMPO even if doc is different