REMOVE

1. Plane-spotting

WHAT

1. Landmark sculptures (2)
2. Public art -- England -- … (2)
3. Public sculpture -- Engla … (2)
4. Tourism -- England -- She … (2)

WHERE

1. ENGLAND, UK (2)
2. Sheffield, South Yorkshir … (2)

WHO

1. DISLEY, Mike (2)

WHEN

1. 1996 (2)