Possible Clues:

• One pitched in river for easing of tension
• Lessening of tension in political affairs
• Easing of international tensions
• De-frosting?
• A mutual easing of tensions inside ten terraced houses
• PM Heath reflected, around his home, on English reconciliation
• Warming in hostilities
• Attendees not as drunk as closer relations
• Relaxation of French taking wine with English
• Need odd bits of treaty reworked to achieve improved relations