Catherine was a fantastic tour guide! This is a once in a lifetime kind of experience, well worth paying for and booking. The amount of steps seems daunting but it’s broken into 3 parts on the way up and a couple of parts on the way down and the guide kept checking on us to make sure we were ok. We were given ear plugs as it does get noisy but it is the best sound ever! I felt so patriotic. This tour lasts about 90 mins and I wouldn’t give it less than 5 stars but one major gripe is… we weren’t allowed water, now me and mum are asthmatic, going up steps in warm weather and the guide had water, she did give us some from a first aid box as we were desperate but it isn’t good we couldn’t take water, another gripe is we couldn’t take our phones for photos! But we made memories. It isn’t too easy to find, go to the Westminster entrance and it’s round there where someone will meet you and guide you where you should be, they do lock your valuables away safely whilst you’re on the tour. I’d definitely recommend this tour it was incredible, tiring but we’ll worth doing