Shortly thereafter, he was joined by pen-knife maker Philip Unwin, and, by the late 1820s, the new firm of Unwin & Rodgers was advertising a line of small knives and assorted sundries ...

A small knife was used for this. It marks the origin of the pen knife. Before 1850, the process for vulcanization of rubber had not been discovered, and the only way to correct a writing mistake ...

Police have said that further "proportionate" action could be taken after a pupil brought a pen knife into Hatch Warren Junior School.