Interlink dont usually deliver on a Saturday. We use them for work and they charge a fortune for Saturday deliveries.
The website says: "We offer next working day delivery on orders placed before 1pm on a working day" and obviously Saturday isnt considered a working day.
I read that but it reads that if you order on a working day you get next day not that you can only receive on a working day. Just clicked the track link and its in Birmingham, literally 30 mins from my front door. X