We recommend taking public transport - the meeting point is directly outside Green Park Tube station (Piccadilly, Jubilee and Victoria lines).
If you do decide to drive, the nearest car park is the NCP Car Park London Carrington Street, which is open 24 hours and is just a 5-minute walk away.
Green Park station has step-free access and the tour itself, including the River Cruise, is wheelchair accessible. The tour also has buggy access but bear in mind there is a moderate amount of walking during the tour.
There are plenty of family-friendly restaurants near Green Park station including Prezzo, which is a 7-minute walk away and has a great kids' menu.
Tickets are non-exchangeable and non-refundable. Please print Kidadl booking confirmation and show on entry.