rubber heels

UK dated informal plural plural-only

(UK, dated, informal) Police officers tasked with investigating corruption within the police force.

Japanese Meaning

（英国、旧世代の俗語）警察内部の腐敗捜査を担当する警察官

The commissioner quietly brought in the rubber heels to root out corruption among the rank and file.

コミッショナーは、隊内の汚職を一掃するために密かに内部監察官を投入した。

Sense（1）

(UK, dated, informal) Police officers tasked with investigating corruption within the police force.

[…] Going in to do the work of the Rubber Heels.'

She asked what the Rubber Heels were, when they were at home.

'The Rubber Heels, heart, are the police investigation department. […]