Various long dated ex-Passover stock found in Watford Tesco and probably in all other Tescos with a kosher dept.
Canned Palm Hearts 14p (was circa £1.99)
Geffen Cake mix 24p (was £4.99) Gluten free - makes great cakes
Matzo Meal 7p (was £1.49) - a brilliant substitute for breadcrumbs
Matzos 7p (was up to £1.50) - cheapest crackers in Tesco!
Egg Matzos 14p (was up to £1.99) - sweeter than standard matzo
There are other offers too but can't remember the exact pricing (cereal, toothpaste, noodles, biscuits)
I'll post a receipt if people don't believe me but short of time to do so now!