I took a tour on April 17, 2023 with Horizon Private Hire. I know private tour companies are hard to find for the port of Dover. We've used him in the past and enjoyed it enough that we booked for this year and were really happy that we did. We shared the tour with two couples from our cruise critic roll call and everyone had a fantastic time. The tour that I chose went to Canterbury Cathedral (Gary Price is probably the only private guide allowed to guide inside the Cathedral.) You pay for the service directly to the Cathedral. We also visited Dover Castle and had a nice walk along the White Cliffs of Dover. I would rank him as one of the top guides we've ever used. The vehicle is very comfortable for 6.