An image from Bagpuss, one of the productions that also features Peter Firmin.

Peter Firmin

December 11, 1928 — Harwich, England, U.K.

Peter Arthur Firmin (11 December 1928 – 1 July 2018) was an English artist and puppet maker. He was the founder of Smallfilms, along with Oliver Postgate. Between them they created a number of popular children's TV programmes, The Saga of Noggin the Nog, Ivor the Engine, Clangers, Bagpuss and Pogles' Wood.

Description above from the Wikipedia article JPeter Firmin, licensed under CC-BY-SA, full list of contributors on Wikipedia.