Some examples from the thread -
Iams Dog Tesco £10+ Asda £5
Heidseick Tesco £28.99 Asda £19 so a bottle of champagne for £9?
Glade Sense Tesco £10 Asda £5
Kelloggs Frosties 500g £1.97 / £1.00 It think cornflakes are the same price.
Wolf Blass Yellow Label Cab Sauv 75cl Tesco £9.49 Asda £6.00
Magners Irish Cider 8pk X 500ml Tesco £10.99 Asda £7.00
Stainless Steel Dish Drainer - £8.80(tesco) £3.00(Asda)
Walkers Comic Relief Steak & Al Pie 6pk 150g - £1.59(tesco) £1 (Adsa)
Huggies Baby Wipes Natural Care 64 - £2.59(tesco) £1.00(Asda)
Olay A/W Aqua Physics Serum 50ml - £12.24(tesco) £5(Asda)
Hardys Crest Cabernet Shiraz Merlot 75cl Tesco £10.49 Asda £4.78
Baileys original £19.19 in Tesco £10 in Asda so if they give you 2x the difference a bottle of Baileys for 81p
Hellmanns Tomato Ketchup 430ml £1.57 £1.00
Napolina Chopped Tomatoes400g £0.99 £0.55
Napolina Peeled Plum Tomatoes 400g £0.99 £0.55
Pot Noodle Beef & Tomato 4 Pack £3.97 £3.00
Walkers Comic Relief Jimmy Concarr-ne 6pk 150g £1.59 £1.00
Walkers Comic Relief Frank R. Dinner 6pk 150g £1.59 £1.00
Haywards Sweet Pickled Onions 454g £1.32 £1.00
Own Label Cantaloupe Melon Class 1 £1.99 £1.00
Own Label Watermelon £3.79 £2.87
Becks Blue Alcohol Free Lager 6x275ml £3.52 £2.38
Filippo Berio Extra Virgin Olive Oil 1l Tin £6.49 £3.98
Own Label Value Toilet Tissue 4 Roll 800sht £1.00 £0.52
Alpro Strawberry & Fofsoya Yofu 4x125g £1.75 £1.25
Linda Mccartney 6 Vegetarian Sausages 300g £1.83 £1.00
Iams Cat Food Adult Chicken 1kg £5.06 / £3.00
Surf Small & Mighty Sunshine 1890ml £8.65 / £5.00
Comfort Conc Fabric Cond Blue 1.5l Tesco £3.33 Asda £2.00
Comfort Conc Fabric Cond Pure 1.5l Tesco £3.33 Asda £2.00
Comfort Conc Fabric Cond Sunfresh 1.5l Tesco £3.33 Asda £2.00
Comfort Conc Fabric Cond Tropical 1.5ltr Tesco £3.33 Asda £2.00
Comfort Exhilarations Strawberry 750ml Tesco £2.23 Asda £1.00
Southern Comfort 70cl Bottle Tesco £18.39 Asda £13.00
You might need this link for the price checker -
http://www.tesco.com/whatsinstore/pricechecksearch.asp