Laying in the supplies: T-15 and counting

So taking the opportunity whilst in Granada, I popped into Corte Ingles to stock up on some supplies for the forthcoming trip to the hinterlands of the Known Universe (Outer Hebrides). I’d decided to buy a rucksack, and carrying everything in that on the trip. “What do you need a rucksack for?” asked the gf. “You spent 70 quid on a nice hand-luggage suitcase last time you were in the UK, use that”.