REMOVE

1. Roofs
2. Architecture -- 2000-2100
3. ENGLAND, UK

WHAT

1. Architecture -- England - … (7)
2. Building materials (7)
3. Buildings -- Repair and r … (7)

WHERE

1. Sheffield, South Yorkshir … (7)
2. Liverpool, Merseyside (2)
3. London (2)

WHO

1. PROJECT ORANGE (6)
2. not known (6)
3. WILKINSON EYRE ARCHITECTS (2)
4. A.B.K. Architects (1)
5. BARLOW, William Henry (1)

WHEN

1. 2012 (6)
2. 2005 (3)
3. 1868 (1)
4. 1961 (1)