I bought the M&S advent calendar at the weekend.
You need to spend £25 on beauty to be able to purchase it for £25.
However, not a lot of people realise that the original £25 spend is before any deductions.
I bought 2 items that were originally priced at £12.50 each. I added the advent calendar which came up at £200.
I added my sparks card which took off 20%.
They then totalled the till and the 2 original items were half price at £6.25 each.
I ended up paying just over £32 in total!
Bargain.