This directory allows you to search for the details of a particular tower, or a number of towers depending on the number of bells and/or practice night. You can also use the tenor weight slider to further restrict the list of towers. Simply click on a tower in the list to see the details. Only a few towers are shown at a time, so to scroll to the next or previous set, click on the > or < in the upper right corner. 

If you see an entry with a triangle (Δ) in it, that can means that the session is either irregular or by arrangement only. Or at least it needs some qualification. Be sure to check the comment line for the explanation. As a rule, a triangle usually means that it is best to contact the tower before planning a visit on a practice night or to join the local band for Sunday ringing.