Select bras are buy one, get one free at La Senza right now. The sale is good online and in-store. There's no code required for online purchases -- just put two of the eligible bras in your shopping card, and the discount will be taken automatically. The sale is for a limited time only -- but they haven't told us how long that "limited time" is.
If you're shopping online, shipping is free on orders over $89.

http://www.lasenza.com/eng/index.cfm