There have been some previous posts asking whether sighseeing bus tours are available. The Big Bus Company which also operates in London and Dubai has just started a "hop-on, hop-off" open-top sightseeing bus service in Hong Kong with recorded commentary in eight languages.
There are two routes, "red route" starting at Star Ferry Pier in Central touring Central, Wan Chai, Causeway Bay and Admiralty with stops at HKCEC, Lower Peak Tram Terminus and Lan Kwai Fong. The "blue route" starts at Tsim Sha Tsui East Promenade near Starbucks on the Avenue of Stars/New World Centre and tours TST East, TST, Nathan Road, Monkok and returns via Canton Road with stops at Langham Place, Temple Street and Mody Road.
A single ticket covers both routes. The routes are connected via the Star Ferry and the ticket price includes both a return Star Ferry ticket and a return Peak Tram ticket.
Tickets are HK$320 adult for the Big Bus Day Tour which operates every 30mins between 10am and 6pm and the ticket lasts for 24 hours. There's also a "panoramic night tour" which costs HK$200 or a "combo ticket" for both day and night tour costs HK£$420. There are concessions for children 5-15 and a family ticket is also available.
Tickets can be bought online, via hotels or by phone and although it doesn't say this in the publicity leaflet I was told by Big Bus staff that you can purchase on the bus.
refers to a special introductory price of HK$200 for the blue route only as this route was "soft-launched" on 15th Dec but both routes now appear to be operating so I assume full prices may now apply.