Are there guided tours, if there are what times and what cost?
Visit their website and click on 'Visit & Contact'. You will find tour details, opening hours, cost etc. It does say 'subject to volunteer availability'. So if you are travelling from afar - email or contact them first to be sure.
Yes, there are guided tours that are included in the admission fee, so not an extra cost as far as I know. They are quite regular - perhaps every hour?
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