Taken from their website it would seem they are:
http://www.sportsdirect.com/CustomerServices/aboutus.aspx
About Us
You may not realise it, but the chances are you have been into one of our stores, whether its your local Sportsdirect.com high street store, or maybe you have visited our prestigious Lillywhites store at the foot of Eros in London's Piccadilly Circus, you`ll be surprised at how many stores we operate.
We currently have over 470 stores within the SPORTSDIRECT.com Retail group, including SportsDirect.com, Sports World, Field & Trek, Hargreaves Sports, Gilesports and Donnay International, as well as stores in Ireland, Belgium, Holland and Slovenia. This coupled with an ongoing expansion programme, which will see us continue to open many new stores within 2008/2009, means we will soon have a new store on your doorstep ensuring SportsDirect.com remains the number one Sports Retailer in the UK
We sell leading 3rd party brands such as Nike, Adidas, Reebok, Umbro and Fila, plus group brands, such as, Everlast, Lonsdale, Dunlop, Slazenger and Karrimor and our wide product range covers all sports and activities.
Alongside our many retail outlets,
www.sportsdirect.com not only allows you to access all the great brands you will see in our stores but have them delivered to your door the very next day!
As we continue to push for the best service and range of clothing, footwear and equipment possible, we are always keen to hear any feed back from our customers. If you have any comments, points or questions we would really like to hear from you.
I'm not affiliated in anyway just thought it was a bargain !