The Miniature Sheet commemorating the 50th anniversary of Monty Python and the Holy Grail is cancelled with a specially designed ‘Ni!’ postmark with the location Knight’s End – a playful nod to the film’s infamous knights who say ‘Ni!’.

The medal is mounted with an illustrated card featuring fascinating behind-the-scenes stories of the film’s chaotic production alongside reflections on its enduring cult legacy and comic brilliance.

The visually vibrant envelope design includes imagery and artwork from a 1975 film that blends humour and history as King Arthur and his not-so-noble knights encounter killer rabbits, rude Frenchmen and absurd medieval trials.