Update 04/02/18: The new Barclays branding is now live. Hopefully this means that the Barclaycard Arrival Premier will be launching soon.
Barclaycard will officially rebrand as Barclays in April. In you latest credit card statement you should have received a note stating as much (see below).
Barclays is how they are branded in the United Kingdom and Barclaycard is a division of Barclays. Maybe Barclaycard/Barclays will also use this as an opportunity to apologize to bloggers for sending out automated legal threats for using the Barclays branding instead of Barclaycard. I guess the alternative is that their algorithm will be updated and any references to Barclaycard will result in a legal threat to change them to Barclays.
