You can pan the map, and zoom in and out. If labels overlap, zoom in to separate them. Hover any area to highlight it.
Base map, premises location and address information © Crown copyright and database rights 2022 OS 0100060997. You are granted a non-exclusive, royalty free, revocable licence solely to view the Licensed Data for non-commercial purposes for the period during which the City of Durham Parish Council makes it available. You are not permitted to copy, sub-license, distribute, sell or otherwise make available the Licensed Data to third parties in any form. Third party rights to enforce the terms of this licence shall be reserved to OS.
Using Leaflet — thanks to Matthew Phillips for help with the coding.