I find Harveys Maps to be much better for walking. They don't cover the whole country but they do have the advantage of - Having the whole of the Lake Distric

I find Harveys Maps to be much better for walking. They don't cover the whole country but they do have the advantage of - Having the whole of the Lake District on a single map. - Printing on plastic so they don't get damaged and are more compact than the OS laminated maps - Excluding political boundaries as I don't care about them - Showing the location of the footpath as well as its legal location; sometimes they're on different sides of the wall - The reverse of the map usually gives you detailed information on the layers of rock beneath your feet which is interesting for extra reading.