I have the same problem, it started one year ago when it refused to start once, but never happened again for weeks while now it is every morning, took the car to Toomey (laindon) who stated they needed to replace the started motor but the car could start if not from cold, so I rejected the £180 they wanted, plus they stated they needed to order a starter motor (renault dealler??). It is clearly a juice problem because it makes no noise when cold but always starts if driven in the past few hours, the AA tested the battery and it was fine. The only solution I have found that works is to park on a hill, my trust in renault is gone this is my third and last scenic.