Cab 12, coincidentally, my PCP and its companion FTTC cab has been full for some time. The other serving that estate is #8. Cabinet 29 is a new one installed under BDUK, and serves roads ranging from 150 metres from the exchange as far as 1500 metres+ according to
Magenta's Code Look. As that cabinet covers such a wide area in the nature of fill-in, any reason for inaccuracy in Magenta eludes me. Cabinet 28 is similar in nature.
My surmise is that the slow FTTC is pro tem some further work to get full speed