Expires 4 months after purchase. Limit 1 per person, may buy 9 additional as gifts. No booking required. Present Groupon on arrival at one of the City Cruises booths at Westminster, Tower or Greenwich piers. Child fares are valid between the ages of 5-15 years. Under 5s travel free of charge. Under 16s must be accompanied by an adult. Departures are roughly every 40 mins starting around 10am and finishing around 6pm. Please remember to check the times of the return boats. River Red Dover hop-on-hop-off ticket grants access to the services for a 24-hour period. See the cruise timetable. Step-free access available, please book with the merchant directly before arrival. Available departure points: Westminster Pier, Victoria Embankment, Tower Pier, Lower Thames St and Greenwich Pier, Cutty Sark Gardens. Valid daily. Valid for option purchased only. *Discount applies to selected options only.