An enclosure assembly (1), and method of assembling transportation packaging therefrom, which is adapted to be supported on a container (2) and in situ the enclosure assembly encloses a region above the container, said enclosure assembly comprising co-operable attachment means (3, 7), the arrangement of the enclosure assembly being such that in use the attachment means of a first enclosure assembly which is supported on a container is engaged with the attachment means of a second enclosure assembly, said enclosure assemblies forming a stack in which the second enclosure assembly encloses a region above the first enclosure assembly. Advantageously, the enclosure assemblies can be stacked together to form a substantially rigid structure above the container according to the height of the goods in the container.