The MASSIVE SHED outside the LHR CH

Just heading out of the LHR CH (lovely as ever: big fan of the new roast padrĂ³n peppers) for the VS1.
Does anyone have any further info on the massive 'shed' which now blocks out so much of the view from the CH?
I've had different explanations from various CH staff: transit lounge; offices; temporary; permanent...
Any ideas?
Does anyone have any further info on the massive 'shed' which now blocks out so much of the view from the CH?
I've had different explanations from various CH staff: transit lounge; offices; temporary; permanent...
Any ideas?