An awful lot of OS data is actually available directly from them under the open government licence in recent years. Recently they added their UPRN (unique prope

An awful lot of OS data is actually available directly from them under the open government licence in recent years. Recently they added their UPRN (unique property reference number) database and some other ones. OpenMap Local and OpenZoomstack are both available as open data, and give an awful lot of what most people are looking for when it comes to map data.