Buy any 3 Rimmel Products at Boots and recieve a free gift. Rimmel also is 3 for 2 so you only actually pay for 2 products instead of 3 and you still recieve the free gift.
The gift is a pretty gold makeup bag and brow this way brow sculpting kit (medium brown).
The cheapest product is the pencil eyeliner at £2.99: http://www.boots.com/en/Rimmel-Soft-Khol-Kajal-Eye-Pencil_6950/
I can confirm that the brow kit is in the bag. It's not very clear online but when I picked this up instore the brow kit was included.