It seems Games Workshop are in the application process of a Warhammer World Expansion.
The description of the proposal states that
NEW PROPOSED VISITOR RECEPTION FACILITY TO MAIN ENTRANCE TO FACTORY / RETAIL AREAS INCORPORATING NEW PUBLIC ACCESS STAIR AND LIFT TO MEZZANINE
AND FIRST FLOOR
ADDITIONAL MEZZANINE FLOOR SPACE TO CREATE EXTRA EXHIBITION AREAS AND ALTERATIONS TO GABLE END AND NORTH EAST ROOF IN CONJUNCTION
ADDITIONAL FIRST FLOOR SPACE TO EAST CORNER OF BUILDING TO CREATE EXTRA WORKSHOP FACILITIES
ALTERATIONS TO CAR PARKING LAYOUT AS A RESULT
I won't bore you all with pictures of the building plans and all that shite but you can find it all over here.