@petejackson745
Well that’s the nub, really. Why will TfL already have the data in their systems somewhere for monitoring purposes? All they need to monitor is the performance of the route’s live running. For that they do not need the depot. If they don’t need it, odds are it will become inaccurate, even if it is recorded accurately spread across hundred of documents elsewhere.
Obviously fine to ask how easy it is to do but whether it is worth doing depends on whether “it” will actually enable you to do, that is to track of all one depot’s buses. If “it” has to be trip-based, that may make a heck of a difference to the cost and therefore whether it is worth doing.
If TfL are going to have to do it meet national guidelines that would change everything, of course.