Complex sentence: In the United Kingdom there has been little need for the food truck or wagon in civilian life, and its limited use was for the military, and it wasn't until World War II and the advent of motorised transport that food trucks came into common use.
Split into simpler sentences: In the United Kingdom there has been little need for the food truck or wagon in civilian life, and its limited use was for the military. It was not until World War II and the advent of motorised transport that food trucks came into common use.