A while back, I too received a second-hand Schools (907 Dulwich) bubble-wrapped in only its Hornby outer box. Although a number of parts were detached, none of them was actually broken (as appears to be the case in your photographs).
Although Royal Mail should undoubtedly have taken better care, part of the problem would seem to be the strength (or lack of it) of Hornby's (China) assembly process?
Tony