The lamb is that of St. Wilfrid who is the Patron Saint of Preston. The letters ‘PP’ are taken to mean ‘Princeps Pacis’, ‘ Prince of Peace’ for those less acquainted with Latin. On earlier versions of the arms the lamb was standing and three letters ‘P’ were depicted on it. The reason for the three letters was quite simply to give a general balance to the arms. The arms were in later years modernised and one of the letters ‘P’ was left out, again as a method of improving the general design balance. Preston North End eventually dropped the three red roses from their crest.
The lamb appears to have a divine halo or sun behind it's head also