As we approached we met a boat emerging, so they were able to drive on and we could drive straight in. Before we’d even started operating the lock a woman appeared saying they were coming the other way, so we could leave the gate open on exit. This made it one of our fastest and easiest lock operations. The stop locks are left over from the days when canals were owned by competing companies. The deliberate height difference would make it hard for one company to use the water from the other canal, and it also forced boats to stop so that tolls could be collected. These days they are as much of a relic as rail tickets that can be used on only one of our state-run railway companies.