Historical clue formulations

• Famous British rock group — 2024-12-27
• Classic British rock group — 2020-11-27
• *English rock group? — 2015-09-29
• Site of an annual British music festival — 2015-05-29
• Site near an outdoor recording session in "Help!" — 2013-03-01
• Wiltshire wonder — 2001-02-09
• Neolithic mystery — 1995-08-08
• Salisbury Plain attraction — 1994-07-07