Similar to my post about amazing deal on Bourjois at Boots, link is here http://www.hotukdeals.com/deals/boots-bourjois-3-for-2-plus-free-gift-worth-25-2559919?p=29306085
If you are not a fan of Bourjois, Superdrug is doing 3 for 2 for L'oreal plus free Volume Million Lash Mascara worth £10.
In my opinion, L'oreal cosmetics are generally better than Bourjois and the range is also much variable.
My recommendations are their True Match range and Infallible range.
Also don't forget cashbacks.