I apologise for the delay and lack of info. Royal Mail tracking is a mess at the moment due to weight of Christmas post.
Items are getting through, but slower than usual and with little or no tracking info.
Sadly, this happens every year with Royal Mail. It surprises me a little this year because the wealth of alternatives means that Royal Mail volumes are decreasing. I had hoped that the failure of the company would contribute to a better Christmas experience for customers.
It's a bit awkward for us to offer courier shipping on all items due to our flat zero shipping fee, but it is something we're thinking about for next year. The bulk of our mail is now with UPS and this has experienced no delays or tracking problems. So, after Brexshit is resolved somehow, this might not happen again next year.