About one hour for the guided tour of the bunker itself but allow another 90 minutes or so for the purpose-built and very informative museum next door.

Apologies for the late reply, but yes, there is a car park.

Hi there. While the Visitor Centre with exhibition is fully accessible via lift, the Bunker itself is only accessed via 76 stairs. Sorry to disappoint - it is a Grade I listed building, and we therefore cannot alter the entrance.

You can get the train into Uxbridge from Heathrow on the tube it is the Piccadilly line. It is not far from there but a bit tricky to find if no transport so I would get a cab from the station it wont be very expensive. Ring ahead to the bunker and book a visit you will love it very interesting.

You will only need to book in advance if you have 10 or more people in your group. Otherwise, you can just turn up and book on to the next available tour. I hope that helps!

Yes there is parking although there is not much. We have struggled to park in school holidays.

You only need to book in advance if there are 10 or more in your group. A combination adult ticket is £7.

Don’t know

Sorry I can't remember but I don't think it was expensive.