is the best site for collating most of the things available in the UK (except Ray Rose shoes).
They are however, not the cheapest source to buy things.
You should note that all their prices are excluding VAT -- so add another 20% onto the price you see on the website!
Shoes
Dancesport UK offer an excellent guide to buying your first dance shoes and also a handy brand comparison chart. They've also compiled a comparison of shoe fittings between various brands!
If you're searching for the cheapest place to buy shoes, make good use of your EADA and IVDC (student uni circuit) discounts:
If you'd like to try on lots of shoes before you buy, there are shops that offer a mix of various brands. It's best to drop them an email / call before you visit to make sure they have your style / size in stock:
Other dance shoe websites include:
There are plenty of others out there so have a quick Google!
Dancewear
Tailsuits
Specifics
Dancewear and Fabrics
European (for those that prefer to buy in Euros)
Other Continents
Grooming