Battery drain

Hello there, my electrical problems continue to frustrate me! Although I am finally getting to grips with various ABS, oil level sensor type warning lights I am now experiencing a battery drain which has started recently when the car is left for more than a day or two.

It seems a bit of a coincidence that since the weather has turned it lets me down. Ever since I've had this car its had some sort of electrical issue and the radio still goes dead every other day and requires me to disconnect the battery and restart/reboot the engine. The battery is new with good connection.

I am beginning to think that all roads lead to Rome but want to avoid various diversions to correct the fault.

I am losing patience. That said I love the car!

Any advice appreciated. I will post a pic when I get a chance.

Cheers