We are Royal Caribbean cruisers but when we read about the Britannia, we thought we would dip our toes in the P + O waters and also visit the Norwegian Fjords for the first time.
Embarkation at Southampton was very smooth and it took about 30 to 40 minutes from arrival to get on the ship and have a look around. We were told that our embarkation time was 3 pm but we arrived at the Port at 12 pm and were checked in quickly and without question, which was great for us.
The Atrium is very impressive and we liked the decor. It's classy and there's plenty of space, which was a plus point on this ship. With 4000 passengers, we couldn't believe that it was so easy to find somewhere to sit and it never felt cramped.
Excellent room, no complaints. It's all covered in the review comments above.