[M&S] Christmas 3 for 2 sale,get every third item free

Find everything you need for Christmas in M＆S mix ＆match 3 for 2. choose any three items and get the thirs one free. Not the three cheapest, but the third product free.

It is even better value when you buy 6 or more gifts. if you buy nine gifts, the ones you get free are the third, sixth and ninth most expensive,