REMOVE

1. Roofs
2. Buildings -- Repair and reco …
3. ENGLAND, UK

WHAT

1. Buildings -- Change of us … (8)
2. Architecture -- 2000-2100 (7)
3. Building materials (7)

WHERE

1. Sheffield, South Yorkshir … (6)
2. Retford, Nottinghamshire (2)
3. Godmanchester, Cambridges … (1)
4. London (1)

WHO

1. not known (7)
2. PROJECT ORANGE (6)
3. CLARKE-HALL SCORER & BRIG … (2)
4. HAJNAL-KÓNYI, Koloman (2)
5. SCORER, Sam (2)

WHEN

1. 2012 (6)
2. 1961 (2)
3. 1603 (1)
4. 1868 (1)