There's a B&M beside my gym and usually all it does is tempt you to eat sugary sweets therefore wasting your gym session.
However, the other day I found Red Jalapeños for 69p for a 480g jar. Also available were roasted red peppers at 69p and green jalapeños at 89p.
I stocked up on all three as it seems pretty much half the price of most supermarkets for that size of jar (I usually buy something like Old El Paso for at least £1 for a 200g jar).
Anyway, might be a pretty niche post, but I hope it helps a fellow red jalapeño lover!
Sorry, I never asked if it was nationwide.