Frequency 
Until 24th March buses will operate every 30 mins. 

Another way to find each bus stop is to use what3words. This will pinpoint a 3 metre square box where you will find each. The words to use can be found here

Free Boat Ride operated by City Cruises

Boats leave every 30 minutes from:

Westminster Pier, Victoria Embankment, London SW1A 2JH
Tower Millennium Pier, Lower Thames St, London EC3N 4DT

The boat cruise is approx. 30 minutes in duration.

Audioguides available in 11 languages (English, French, German, Italian, Spanish, Chinese, Russian, Brazilian Portuguese, Hindi, Japanese and Arabic)
This is Hop-On Hop-Off bus service, you can join at any Golden Tours bus stop.
No restroom available on board.
Duration valid from when you first hop-on the bus. Unlimited usage within your chosen timeframe. Does not include London by Night service. 
Free River cruise to be used between Westminster to Tower Bridge Quay or to Greenwich or vice versa. Please show your voucher at the Thames River Services ticket booth
Please view the Schedule tab for bus timetables and other helpful information.
**You can cancel your reservation for this product up to 24hrs before to get a refund in full.
To view the latest service information please visit here.

Jack the Ripper Walking Tour
Start time: 3:30pm daily (Please arrive 15 minutes prior to departure time)
Finish time: 5pm 
Departure Point and Directions: Exit Tower Hill Station, London and wait at the Ice Cream Refreshments stand next to the station exit
Return Location: Near Liverpool Street Underground Station

Royal Walking Tour
Start time: 10am daily (Please arrive 15 minutes prior to departure time)
Finish: 12pm
Departure Point: Tourist Bus Stop outside The Queen's Gallery, Buckingham Palace, Buckingham Gate, SW1A 1AA (Nearest underground station: Victoria and Green Park)
Return Point: Westminster Abbey (Nearest underground station: Westminster Station)