Silverline LED torch- £5.30
Get back to your tent in one piece
Anyone who's tried to find their tent at 4am when the last band has finished, and more than a few warm beers have been consumed will appreciate that without light, you're more lightly to find yourself passed out in someone else's gazebo than your own sleeping bag.
LED lights are efficient enough to last all weekend, bright enough to pick your Millets budget tent out from the other 10,000 and light enough to slip into your pocket.
Buy it here: Power Tools 2 U