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2003 1.2 Battery losing charge - Big_McG
Battery loses charge when car not run for 4-5 days , battery is new and recharges easily.
2003 1.2 Battery losing charge - Screwloose

Although even new batteries can be faulty; it would appear that you have a parasitic drain at work.

Do you have any sort of equipment available to start tracing it?
2003 1.2 Battery losing charge - oilrag
Has it an after-market stereo fitted (sometimes altered wiring causes a steady discharge) and is the boot light remaining on?

Remove the rear parcel shelf, close the boot and have a look as its independent of the lights circuit.

2003 1.2 Battery losing charge - Big_McG
do you mean a ampmeter and going through the fuse box fuse by fuse ?
2003 1.2 Battery losing charge - Screwloose

If you can lay your hands on a milli-ammeter - particularly a clamp one - that would be ideal.