We enjoyed the experience - Alan (the tour guide) ...

We enjoyed the experience - Alan (the tour guide) was very good, he has the perfect voice for it, a lovely manner and some good little jokes along the way.
It would be nice if those with young children could go in first, 5 minutes before the tour started to check the children would be ok with it and get used to it - we took ours thinking they would be alright but unfortunately had to interrupt the first few minutes to get them settled outside as it was a bit too dark for them and didn t want to continue.