Why the 'We want eight' campaign worked

Why was the 'We want eight and we won't wait' campaign effective?

It created visible, repeated constituency pressure that made naval construction politically difficult for MPs to ignore.

The slogan succeeded because it made naval construction a subject voters repeatedly raised with their representatives. Britain's relatively compact constituencies and traditions of canvassing and local meetings exposed MPs to concentrated public pressure. Repetition at the doorstep could turn an issue from a distant concern into something politicians felt required immediate action.