Thank you all for the helpful information. New to this new class of ships I had booked a guarantee balcony not an infinite balcony guarantee. I think Celebrity could have made their marketing a bit clearer as I had no idea there were a small number of balconies with regular doors and a porthole views on the ship. Lesson learned. I was able to upgrade to a concierge cabin for a great price so all got sorted in the end. Very grateful for all who helped me solve the dilemma.