Hi Keith
I have a 2005 8PA Sportback 2.0l petrol and have exactly the same problem. The battery went flat after 3 days of not being used. I connected a meter between the earth terminal and lead and it registered 1.1A . I thought this was probably the interior lights. I went back to the car later and found the current drain had increased to 5A!! This may be intermittent. I have pulled all the fuses in the engine compartment but have run out of time to check the dashboard fuses. I will post any findings tomorrow