They take the pigsback money off vouchers when things are on special.
They had the big Persil Bio liquid on special for €10 2 weeks ago and I had a pigsback voucher for €2 off. They accepted my voucher no questions asked.
It's not the first time I have used these vouchers with stuff that's already discounted and it's not limited to Tesco either. For the past few weeks I have used the pigsback 60c off JM&B white sliced pan in Superquinn where they already had it reduced to €1.30.
They are €2.79, now reduced to €2 until the 11th. Wonder if they would also take the coupon with this? €1 for 6 bars approx 17c per bar would be quite a nice price
I had a number of €2 off vouchers for a Ben and Jerrys 500ml tub of ice cream. When they were half price in Tesco I ended up getting each tub for circa 80c.