Asda interview- ‘no trainers, smart casual’ should I wear brown boots or navy vans?

Neither ...? Brown boots sounds really ... not professional. Navy vans have the same ring ...

Go for a decent black shoe that isn't a tennis shoe. If this is a place you want to work then you should dress like you want to be there.

Navy vans say "I'm running out of here to go hang out with friends as soon as I'm done pretending I care!"

Brown boots say "I didn't start caring, yet."

Unless you're applying for a ranch hand job? In which case, brown boots.

Then again, Asda is a supermarket? Navy vans might not be so bad ... If the sole is also dark and not white.

I'd say a solid black shoe is where you want to be. If you have absolutely no other choice, Navy vans might be okay.