First time on P&O, big lovers of Celebrity, and have sailed on Royal Carribean and Princess but decided to try P&O and Britannia for my Wife's 60th Birthday.
Travelled by Coach to Southampton, embarkation was efficient although we were fast-tracked through as we were travelling on a Coach booked through P&O. Looked like some people had been there a while though.
Cabin A406 -A Deck (Deck 15)
Paid a little extra for this, huge cabin, two tv's, kettle, Bath, shower, Balcony, Sofa, just a really big cabin. On top deck 15, but the overhang from above shields the sun and it's noisy from people walking above etc. Deck 11 or 12 would be better.