Historical clue formulations

• "Ta-ta!" — 2018-10-09
• "Toodle-oo!" — 2017-11-24
• "Ta-ta!" — 2015-10-27
• "Ta-ta!" — 2014-11-12
• "À bientôt," across the Channel — 2013-04-19
• "Toodle-oo!" — 2011-01-19
• Brit's goodbye — 2010-03-08
• "Toodle-oo!" — 2009-11-03
• English toast — 2009-01-03
• "Toodle-oo" — 2006-06-08
• "Ta-ta" — 2004-10-01
• "Ta-ta!" — 2004-02-07
• "Ta-ta" — 2001-09-05