u/Suspicious-Catch-220

Bit of a weird one but I've noticed more activity coming from the BT Telephone Exchange at Charles Street. And yes, i know that it is an abandoned telephone exchange from the 70s and open and closed as soon as it opened due to system x taking over. But only this year is that i have seen more and more activity coming from it, such as more vans around the area with people coming in and out, top, second and bottom floor lights on during the day and night which as never the case a few months ago, is something going on? is there something that is happening that we dont know? or is it just simple refurbishment and or maintenence? who knows?