Philips Hue Personal Wireless Lighting 1 m Lightstrip Plus LED Extension Kit (Includes 1 x 1 m LED Lightstrip Plus Extension) £14.99 prime / £18.98 non prime @ Amazon
These are normally 19.99, this is the cheapest I have found. Some one already posted the Light strip itself cheaper (52.49 instead of the usual 69.99 price). They can be gotten from johnlewis.com/phi…792 with 2 year warranty. In total it seems like a great deal.