The coloured area on the map represents the locations where DAB reception should be possible in a car, or using a DAB receiver where the aerial is above ground-floor level. Those areas showing shaded with bright colour (one colour per DAB frequency) indoor domestic reception even at ground level should be highly reliable: please remember that the receiver aerial position and how fast you are moving can affect reception reliability.
I can receive this multiplex in Pocklington, East Riding of Yorkshire with a very strong signal strength on both my Pure One and my Ford Sony radio in the car. (Better than our local Humberside multiplex). What I find strange though is Radio Aire, Radio Leeds and Magic 828 are the only stations available on the Pure One but in the car, all stations are available on the Leeds multiplex.