REMOVE

1. Buildings -- Change of use
2. Roofs

WHAT

1. Buildings -- Repair and r … (8)
2. Architecture -- 1800-1900 (6)
3. Architecture -- 2000-2100 (6)

WHERE

1. ENGLAND, UK (8)
2. Sheffield, South Yorkshir … (6)
3. Retford, Nottinghamshire (2)

WHO

1. PROJECT ORANGE (6)
2. not known (6)
3. CLARKE-HALL SCORER & BRIG … (2)
4. HAJNAL-KÓNYI, Koloman (2)
5. SCORER, Sam (2)

WHEN

1. 2012 (6)
2. 1961 (2)