I discovered the raspberry pi recently from an article and I have read quite a lot about it even went through some tutorials. I want to order a raspberry pi board. I would like to enquire about other items I should include along with the board to make up a beginners kit or if there are any readily prepared kits for learning, and where can I purchase it. A link in the UK is most preferred.
IMO the best way to start is to simply buy some leds, buttons, wires, a bunch of resistors and a breadboard. They're cheap and you can them buy anywhere (on- and offline). Once you're familiar with the pi and have ideas for interesting projects, you can buy additional stuff. I bought my first pi along with the piface, which is a shield with some buttons and leds, but I wouldn't remommend that, it's just too expensive compared to the single components.
user236012's answer is helpful, but as Kozuch pointed out, having a list of components to get would be very helpful for an absolute beginner.
I thought I'd just point out that there is a kit, known as the CamJam EduKit, released by Jamie Mann, of The Pi Hut, and Mike Horne, a CamJam organizer, that comes with LEDs, resistors, jumper wires, a button, a breadboard, and a buzzer.
All of these come packaged up in a nice little box that you can order from The Pi Hut for £5.00 (inc. VAT), €6.26 (inc. VAT), or $8.39.
There are also several free (6 currently, 8 planned) worksheets/projects that you can do with your Pi and the CamJam EduKit that you can download from the CamJam EduKit page on the CamJam site.
Hope this helped some!