| Clue | Source | Date |
|---|---|---|
| Scientist lauded ban on disintegrating building material | The Telegraph Toughie | 13 Aug 2025 |
| Old building material | The Telegraph Quick | 04 Nov 2024 |
| Composite building method (6,3,4) | ||
| Wall-making method | The Telegraph Quick | 27 Aug 2023 |
| Wall-making method | The Telegraph Quick | 07 Aug 2022 |
| Old building materials | The Telegraph Quick | 19 Oct 2021 |