"An eyewitness said the fire appeared to have started in the basement of the Charles Rennie Mackintosh building in Renfrew Street just before 12:30.
Smoke is billowing from the main windows, which are cracking, and through the attic studios.
Smoke is also drifting across the M8. Police have cordoned off Renfrew Street.
Four fire appliances are at the scene.
Firefighters were seen pouring water on the building from a high ladder as flames blew windows out." — BBC UK
breaking story - hoping it's not as bad as it looks...