To manipulate the map, hover your mouse over it - this brings up four buttons to control the zoom. The first allows you to select an area to zoom in on, and the second will determine your location and highlight it on the map. The + and - buttons zoom the map in and out respectively.
Click on a pin on the map to bring up the relevant contact details for that U3A.
View a larger version of New Map of UK U3As.
Please note that the markers only offer an approximate indication as to the general area in which the U3A operates; they are not specific locations.