Possible Clues:

• Ancient tribe back home to the east of rocks
• Old people's home, one civil engineer visits
• Twice nightly? That's more than enough for old people
• Ancient tribe a danger for motorists going to North Island
• Freeze coverage scheme for old Brits
• Queen Boudicca's people
• Tribe in charge of eastern part of UK
• Old people off home to reflect
• Old tribe pleasant, beginning to end, on island
• Lack of warmth in retiring old British people