OK. Here's a BBC article relating to the PS2 in 2004.
BBC NEWS | Business | Retailers cash in on PlayStation
As you can see a quote from a spokesman for Dixons says the following:
"There's nothing in law to stop us from bundling, if we want to," he said, " and sometimes we think there's better value in a bundle.
"But if a customer wants to buy just the console, we'll sell them just the console."
Therefore Gamestation could sell you it singley if they wanted to, they just don't want to or more importantly, have to.