I love buying from La Senza - as I have said on here before, they are a great quality store with excellent customer service. Their current offers consist of 2 bras for 20 quid (pretty reasonable), 2 briefs for £6 (fair enough) or 2 babydolls for the price of one!!
Click the "Go to deal" button to have a browse. I know there's a lot of other members on here who highly recommend this store as well.