Mobiles2YourDoor (a part of the Phones4U group) currently have the LG KG800 Chocolate for just £49.99 on their website in a choice of PINK or BLACK on T-Mobile pay as you go when you buy £10 airtime - that's £59.99 for the package, still a great price. With £5 QuidCo cashback you can reduce the price to £54.99. Even better. :)
The LG KG800 is a smooth, slider phone and looks like a chocolate bar. The external keys are actually invisible, they light up red when ready to use. It has 128 MB internal memory with an MP3 player and MPEG4 video player. The KG800 also has Bluetooth and a 1.3 megapixel camera with flash and video record.