- Strongest evidence
- Met Police assessment reported by Al Jazeera and the three BBC pieces naming Andy Burnham and John Healey.
- Weakest evidence
- The broader ambient stories (international unrest, local health provisioning) which are well sourced but provide limited traction on UK party power.
- Gaps
- No public national polling in the window to test attention‑to‑vote conversion; no internal party polling or briefing documents; no Treasury costings or ministerial responses to Healey’s Heathrow pitch.
- Evidence quality
- High where stories come from named outlets (BBC, Al Jazeera, FT); the political signal in several pieces is low because they are human‑interest or international reporting rather than party competition reporting.
- Source diversity
- Moderate: heavy BBC presence supplemented by Al Jazeera, Financial Times and smaller outlets.