Two of the ships – Arcadia and Aurora – focus on adult-only sailings while the rest cater for all ages. Now part of the Carnival Corporation, P&O Cruises actually dates back to the 19th century.

P&O Cruises flies the flag for Great Britain when it comes to affordable family-friendly and adult-only cruises. Two of the ships – Arcadia and Aurora – focus on adult-only sailings while the ...