The motto on the flag flying at Toad Hall is "Semper Bufo", which is mock-Latin for "Forever a Toad".
Mr. Toad's (David Jason's) gypsy caravan was specially designed for this movie by Cosgrove Hall Productions Cinematographer Frank Hardie, using information from a book on making model caravans. The caravan seen in this movie had an opening roof for interior shots, along with extremely detailed paintwork and accouterments, including a cage for chickens and several cooking pots and pans. After filming of this movie and the subsequent television series, the cart fell into disrepair, before being completely refurbished in 2015.
One of the backdrop illustrators was future Stone Roses guitarist John Squire.
The characters in this movie were made of latex rubber over metal armatures. Between frames, screws hidden behind the latex covering could be turned to simulate character movement.