Having received the same message I wrote to Hattons...
....Thank you for your email,
I can confirm that this item did come into stock at the end of May but due to high demand this item has now sold out completely. We have tried to place another order with Hornby but they have confirmed that this item is out of stock and the line has been discontinued. After receiving the first batch into stock we were told that the pre-orders that were placed after this initial batch sold out, will now no longer be able to be fulfilled as we are not receiving any more into stock.
I hope this makes sense and clarifies your question, if you require any further assistance please do not hesitate to contact us,
Regards,.....