Best sightseeing bus

[DeeLight00]

Hello! I have a relative visiting from overseas who hasn't visited London for over 30 years. They have specifically asked to go on a London sightseeing bus tour and on the London Eye.

Can you recommend a London sightseeing bus company please? Do I pre book or pay on day?

Also, can you get any deals for the London eye?

Thank you!!

I think that you can either pre-book or pay at the bus, OP.

https://www.bigbustours.com/en/london/london-bus-tours

https://www.londoneye.com/