Alibro , thanks , ive done this , you were 50% correct , you cant get to the spring through the light , however you can access the whole switch by removing 2 tiny screws and sliding the handle out and from the outside , my 2 springs were missing , someone had replaced them with a rubber band ! , I dont know why someone would have gone to the trouble of removing the handle and not fixed it properly , only 1 company sell the springs on ebay for approx £7 plus post , however I went to halfords and they sell a box of 100 springs (various) for £4 and the can be adapted. The whole job including the trip to halfords took me 45 mins , thanks again