Full-Freeview vs Freeview Light: map

The map below shows the areas of the UK covered by full-service Freeview (which has six Multiplexes) - coded red on the map and those that get the "public service" Freeview Light (see Will there ever be more services on the Freeview Light transmitters? ) - coded blue.

What do the map symbols mean?

 Freeview transmitter.

Transmitter regions

AngusBeacon HillBelmontBilsdaleBlack HillBlaenplwyfBluebell HillBressayBromsgroveBrougher MountainCaldbeckCaldbeck ScotlandCaradon HillCarmelChattonCraigkellyCrystal PalaceDarvelDivisDouglasDoverDurrisEitshal (Lewis)Emley MoorFremont PointHanningtonHastingsHeathfieldHuntshaw CrossKeelylang HillKilvey HillKnock MoreLark StokeLimavadyLlanddonaLong MountainMendipMidhurstMoel-Y-ParcNottinghamOlivers MountOxfordPontop PikePreseliRedruthRidge HillRosemarkieRosneathRowridgeRumster ForestSandy HeathSaorviewSelkirkSkriaigStockland HillSudburySutton ColdfieldTacolnestonThe WrekinTorosayTunbridge WellsWalthamWenvoeWhitehawk HillWinter Hill