I am hoping to be online early tomorrow (here we go again 😊) to see if I can get tickets to the Big Ben tour that is starting back up in July. While drinking my morning coffee today, I just happened to think about looking into it again and was so glad I did! (One of my kids has a career in conservation so it’d be a wonderful thing for us!) The website says the tickets will be available through a link at 10:00 for the months of July through September. Thought I’d attach the link for anyone who may be interested in going. Best of luck in doing so!
https://www.parliament.uk/visiting/visiting-and-tours/big-ben-tour/