18. Chizami

Independent held the seat; the winning margin narrowed from 38.2% to 14.5%.

Boundaries were redrawn between 1964 and 1969 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 24.3% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 58.7% between them, down from 83.6% — the field split more ways.

Written from the constituency figures by a fixed set of rules — no language model.