You can dock all types of IPod and IPhone and change songs with the included remote.
See description from Apple:
"The Apple Universal Dock serves as a convenient and elegant home base for charging, syncing, and more. Through the use of interchangeable inserts called Dock Adapters, it works with iPhone and all iPod models that have a dock connector. So even if you own more than one iPod or iPhone, you can keep just one Dock connected to your computer, stereo, or TV.
And when your iPod or iPhone is in the Dock and connected to a stereo or TV, the included Apple Remote lets you experience songs, slideshows, and more from across the room. Just choose a playlist, slideshow, or video, then sit back and enjoy. The Apple Remote offers play/pause, volume control, and forward/back buttons for easy control.
Any iPhone or iPod with a dock connector can fit perfectly into the Universal Dock through the use of interchangeable inserts called Dock Adapters. You simply insert the Dock Adapter for your particular model, then plug in your iPod. When you want to connect a different-size iPod or iPhone, simply pop out the Dock Adapter and insert another one.
The Universal Dock package also includes five adapters for iPod and iPhone models. Other adapters, cables, and the USB Power Adapter are available separately."
They sell it for £15 in Tesco Store Leytonstone, but they may have it in other stores too. It is £20 in Tesco Direct, but still a deal, as it sells for £38 in Aplle store and £25 in Amazon.