We parked all day in the free car park alongside the old town stop and took the first trolly that came along - choosing to explore the old town at the end of our tour. Reading other reviews about having to change trolleys at the old town stop it seems like stating here is the best plan. We went on the tour on a busy sunny Saturday and despite hopping off several times and not being able to get on the first trolley that came along, every driver could not do enough to make sure we knew when we would be able to get on one. In 2 instances a spare empty trolley was called upon to pick up the waiting passengers in less than 5mins. The tour was interesting and the drivers were knowledgeable. My one ask is that if you do choose to take this tour and part with your money, please don’t talk whilst on the trolley so everyone can hear the drivers commentary. (Too many people chatting on my trolley, but that’s not the tours fault as they asked them on more than one occasion to stop).