EDIT TO THE BELOW: On 22/12 Emma got in touch advising that they are unable to fulfil the order as they still have no delivery date. (The item is STILL for sale on the website with 10-15 day dispatch time). So they offered a refund and I have accepted.
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Ridiculous Communication - Still not clarity on when we will receive our order. This is the emailed response I received after chasing up our order we placed on 21 Nov:

(I should add that the item we bought is still on the website for sale and states it will be dispatched in 10 - 15 Working days. So makes the reply even more confusing. We just want to know when we will receive our order.)

Thank you for contacting us.
We do understand that you are waiting for your item to be delivered today. Upon checking in your order, we can confirm that the item is still in our warehouse. Be advised that your order will possibly extend the dispatch time frame. Because the item has been stopped selling and promoting the item on our websites and upon checking the update the item will be replenished this week and all orders will possibly have a new dispatch date.
You can check the item on websites to prove that we stop promoting the item on our websites.
We hope this information helps you.
Have a nice day.
Sincerely,
Reymar

Given the lack of any actual information regarding an expected delivery date, and no further response, I have used the Messenger on Facebook. Emma seem active on Facebook fending off lots of very similar complaints. So this is how that went down:

Emma Sleep UK: Hi Bec, thank you for letting me verify. I can see that your query is already being answered by one of our agents via email. I will allow them to continue to avoid sending contradictory information.

You sent: Have you read the email ??? It makes no sense and DOES NOT mention anything about delivery!

You sent: If I had some inclination of when you intend to send me the goods i have paid for - I would not be desperately trying to contact you however I can for a sensible response.

Emma Sleep UK: I haven't read the email. Apparently, it just shows on the notes that it was already answered.

You sent: So. Are you going to find out when I might expect my order ?

Emma Sleep UK: We are currently having delayed dispatch due to the high volume of deliveries and orders from the previous sale we had.

And that is that! Still none the wiser over when I will get my item. I was hoping pre-Christmas, but not looking likely. I am wondering if Emma have regretted the Black Friday sale prices and are forcing customers who placed orders to request a refund so they do not have to honour the sales?