On a double track it is obvious which set of points is facing in the correct direction and which are facing points. And equally obvious is what signal lever colour would be used in the signalbox. But what about on a single track? How would the signal lever be coloured in the box? or would it use 2 levers dependent on which direction the consist is coming from? My question arises from accessing a goods siding on such a line. Can anyone tell me what would be the correct method in the UK please?