Buy 2 Estee Lauder products, get a Free Gift worth £90 + Extra 15% off @ Boots eg 2 x Estee Lauder Double Wear Foundations £56.94 + Gift
Plus use the spend and save offer for extra discount:
Spend £40 save 10% in your basket automatically
Spend £60 save 15% using code SAVE15
Spend £80 save 20% using code SAVE20
You could buy 2 Estee Lauder Double Wear Foundations for £56.94 using code SAVE15 and get the Estee Lauder gift Free.
The cheapest combination I can see to get the free gift works out at £38.70.
Estee Lauder Double Wear Stay-in-Place Eye Pencil (£19) and a Estee Lauder Perfectly Clean Foam Cleanser/Purifying Mask (£24) for just £38.70 (10% off automatically applied at checkout)