Things happen beyond the control of a manufacture, I know some people like to make this seem like a Hornby exclusive issue but that is demonstrably not true, just this week we have seen delays from both Accurascale and Rapido, but people are rightly treating them with sympathy, not derision. It's like people believe that Hornby should have a grip on things outside of their control, maybe because they're arguably biggest or oldest, if so that's flattery I guess but they exist in the same world.
They have made arguably the biggest commitment and release that has been seen from a manufacturer for decades, a bit of understanding can go a long way