Soft-sided lorries are cargo lorries which were first seen in the first season and have appeared consistently ever since. They are based on designs by Austin, Dodge and Leyland from the 1940s and 1950s.
Soft-sided lorries are painted blue, red, green, yellow and grey.
- In the Railway Series pop-up book, Bertie the Bus and Thomas the Tank Engine, a green soft-sided lorry was depicted with a face.
- A model of a soft-sided lorry is currently on display at Drayton Manor.