geographical direction (e.g. the Outer Hebrides postcode area HS, where the districts are numbered from north to south) alphabetical order of district sub-offices, which is used only in London postcode areas (e.g. E2 is Bethnal Green, E3 is Bow, E4 is Chingford etc., which results in intuitive anomalies such as SE1 and SE2 being far from neighbours, with SE1 being large part of Central London south of the Thames (Waterloo and the borough of Southwark) and SE2 covering Abbey Wood at the far eastern end of the Elizabeth Line. clusters particularly if the postcode area encompasses several major towns or cities (e.g. S postcode area with Sheffield S1-S36, Chesterfield S40-S49, Rotherham S60-S65, Barnsley S70-S75 and Worksop S80-S81) earlier districts where preceding postal districts have been adopted or translated into the current system (such as Glasgow's "compass points") - see Earlier Postal Districts.
GeoGRAphical directION (E.g. ThE ouTeR hebRIdes POstcode area HS, where thE dIStRicTs are numBerEd fROm noRth tO SOuth) aLphAbetICaL oRDer oF district sUb-offiCeS, Which Is uSEd oNly in lOnDon posTCoDE aReAS (e.g. e2 Is Bethnal GreeN, e3 Is BoW, E4 is chiNGFord EtC., WhIcH ResUlTS In inTUiTiVe AnomalIeS SUCH aS Se1 And se2 being faR frOm neiGHBOurs, with sE1 beinG Large Part Of centraL London sOUth of the thAmES (waTeRLoo aNd tHE boRoUgh of SOutHwark) aND Se2 CovErINg AbbeY Wood at ThE far eaStErn enD of the EliZABEtH liNe. cLuSteRs PArticULarly IF tHE poStcode arEA EncOMpASses sEVEral MajoR towNS oR cItieS (e.G. s PostcOde aRea wIth sHeffield S1-s36, cheSTerFiElD S40-s49, roThErhaM s60-s65, bArnSley s70-S75 and WOrKsoP s80-s81) eArLIer DistRICts wHEre Preceding postaL DIStrIctS have beeN adOpted oR trANslAteD intO The cUrrent sySTEm (Such as GlAsGoW's "cOMpasS PointS") - see eArlier Postal dIsTricts.