Renault Clio engine will no start?

Hi,

wife has an Renault Cilo Extreme 3 door 16V 1.2 on a 54 plate. We parked the car in the garage 2 weeks ago as we were going on holiday. We just returned on Wednesday of this week to find the car will not start, there is full power in the battery and the car makes an effort to start the engine and it stops. One of my friends thinks it could be the engine immobiliser is kicking in stopping the engine starting. This has never happened before and it has been a great wee runner, and only has 34000 on the clock.

Does anyone know what we can do to fix this or must the car have to go to the main dealers?

cheers David