OK the story is: I was looking for an additional set of Dumbell bars, and the cheapest I found were for £14.99 at Tesco (http://direct.tesco.com/q/R.206-5748.aspx). Then I came across this set at SportsDirect for the weights and bars at the same price! Bargain.
These are the same as the Pro-Power sets Argos sell for £19.99.
Deal is available Online but you would then have to pay postage, making it not such a good deal, hence why I've put [InStore] ;)
[EDIT] oh yeah nearly forgot: If you have a card registered with Quidco you can get 2.5% cash back by using the card instore! (I assume its the same cashback online)