In the 1980s banks and building societies (but mainly banks) were desperate for the business of youngsters. We just wanted the free stuff.
Sadly, I never got the Nat West pigs, but I did get a sports bag and other paraphernalia (including folders, & a pencil case) from Midland Bank when I opened up a Griffins Savers Account. And I still have the bag! I might even have the other stuff somewhere. Am I still with the Midlands/HSBC? Nah, that account got closed years ago. I've had other accounts with them since, but not right now.
Okay, this isn't a great picture of it, it just happens to be one I already had on my phone. I'll dig out the bag sometime and take a better picture.