Thanks guys for the information. I just postponed my ex-ARN OWE trip already ticketed with first flights booked for next week. The very knowledgeable BA agent at Schiphol said there is no problem at all in leaving all flights open for the moment. The validity is one year from date of issue and should I wish to cancel alltogether, I would get a full refund.
Pegasus, it seems you're right about Europe being in area 2.