The Magic Adventures of Mumfie (lost unaired pilot TV series; early 1990s)
From The Lost Media Wiki
The Magic Adventures of Mumfie is a lost, early-1990s animated or puppeteered pilot, created by Britt Allcroft at Shepperton Studios. It was the basis for the later-spawned, popular Mumfie animated series.
In the early 1990s, Allcroft decided to adapt the Katherine Tozer Mumfie novels for a new generation of children. She first decided to film/animate it at Shepperton Studios, before scrapping it for the series it is known as today.
The only remaining image of the Mumfie pilot is an image on the Mumfie Facebook page. It seems that, originally, Mumfie wore a blue jacket with a yellow collar and eight buttons, and Scarecrow had ears. The art style also looked closer to the Katherine Tozer books.