3 boxes of chocolates for £10 in Asda online and instore. The minimum price of the boxes included is £4 but maximum is £5 so potentially you could save £5 if you choose wisely...
Best value are
Green and blacks selection box 180g which contains 12 x 15g bars priced at £5 individually at Asda (£6 in Sainsburys, £5.50 in Tesco and £5 in Morrisons)
Thorntons Milk chocolate classic collection 274g £5 individually at Asda (£5 in Sainsburys, £5 in Tesco and £5 in Morrisons)
Terry's chocolate orange segsations 500g pouch of 5 varieties £4 individually (£4 for 300g carton in Sainsburys, £4 for 330g carton in Tesco and £3 for 300g carton in Morrisons as nobody else does that size)
Rest are Lindt Lindor 7 different varieties in 200g cartons, Ferrero collection 15 piece box, Quality Street 550g sharing bag, Roses 500g pouch, Heroes 500g pouch, Sweet shop favourites 500g pouch, Thorntons continental Alpini box 180g and Thorntons continental Viennesse truffles box 180g.