You can get extremely cheap and normally comfortable bras in Primark and a wide selection of designs from New Look but if you want comfort and correct size i recommend smaller individual shops like ones you find only in your local town. For sexy underwear i would recommend La Senza and if you want sport bras i would recommend M & S or sports shops like JJB. My favourite places for bras are my local bra fitting shop and debenhams who offer a wide selection with good fitting and decent design comfort and ease. They are a bit more expensive but if your willing to pay a little extra it is all worth it. Good Luck.