You will probably get allocated 9C/9D or if available, seats in Row 1. It's also possible they will move the curtain that divides Club Europe and Euro Traveller further back, to create more rows in CE. On an BA Airbus A321, Club Europe can go back to Row 14, so if it's not that far back at the moment, it could be expanded making more seats available

I appreciate you may not wish to share flight details for reasons of privacy, you can use the free Expert Flyer app/website to do a limited number of free seat searches. This will show you if Row 1 is currently occupied, or just blocked out at the moment. Row 1 is held for Gold members until about 72 hours before departure - it's possible you could end up there if it's still free at the point BA sorts out all the allocations.

NOTE: Please be aware that as a new member, you will be limited to just 5 posts in your first 24 hours, so don't feel the need to reply.