Not sure if there's any actual reasoning behind it. It's just aesthetics, though. The white ones just have a plastic faceplate over the top of them, and that's the only actual difference. I assume it's to match the station aesthetics more than anything.Anyway, do you know why some are metal boxes, and some are white? Like the pics above?
Yeah, two larger boxes are for 4G LTE (one for low frequency bands, one for high frequency bands), and the smaller box is for 5G NR.Also, at TCR on both the Central and Northern line platforms there are three boxes. Two of them are like the ones above, but the third is slightly smaller and seems to be made of plastic. Any idea what the third box is for? There are also three boxes at Notting Hill Gate, but only two at Holland Park and Queensway.
Here's my pic from TCR.
