REMOVE

1. Roofs
2. ENGLAND, UK
3. Sheffield, South Yorkshire

WHAT

1. Architecture -- England … (10)
2. Urban renewal -- England … (9)
3. Architecture -- 2000-2100 (7)
4. Architecture -- 1800-1900 (6)

WHO

1. PROJECT ORANGE (6)
2. not known (6)
3. RM Douglas Construction (3)
4. Sheffield City Council (3)
5. YRM-Anthony Hunt Associat … (3)

WHEN

1. 2012 (6)
2. 1990 (3)
3. 1961 (1)