<P> The last two digits, called the Direct Selection code correspond to one or more postal districts . </P> <P> Mailsort codes were sometimes prefixed by a letter (A-P) which corresponded to sixteen regional divisions of the country, although the letter did not form part of the mailsort code . The letter prefix was used by the sender to ensure that when mail was presented to Royal Mail those items with the furthest to travel were given and processed first while those in the same region as the sender were dealt with last . When mail was presented to Royal Mail it was therefore not given in strict mailsort sequence and furthermore the sequence used would differ from one location in the country to another . </P>

Where is the mailsort on a driving licence